Why banking and trading floor HVAC is its own discipline
Banking and financial services HVAC is the most heavily constrained office HVAC environment in Australia. A Premium Grade tower built for a generic professional services tenancy can be specified against the standard NABERS, AS 1668 and SMACNA envelope. A banking headquarters or an investment bank trading floor cannot. The facility carries an additional layer of regulatory, operational and physical security overlays — APRA Prudential Standard CPS 234 (information security), ASIC Regulatory Guide 109 (operational risk for licensed financial services providers), the Reserve Bank of Australia cash handling framework, the Banking Code of Practice administered by the Australian Banking Association, the Privacy Act 1988 and the Australian Privacy Principles, the Anti-Money Laundering and Counter-Terrorism Financing Act 2006, ISO 27001 information security management and a sector-specific physical security culture that traces back to the cash-vault era and has been continuously refined through electronic trading, post-September-11 mailroom screening, post-COVID resilience review and the contemporary climate of cyber and physical hybrid threat. The HVAC ductwork must be specified, manufactured and installed in awareness of all of it.
What makes this environment its own discipline — distinct from generic Class A office tower HVAC, data centre HVAC or hotel HVAC — is the simultaneous presence of seven competing constraints in a single floor plate. Trading floor cooling load (100 to 300 W/m² of internal sensible gain at trader workstation density of 1 to 2 m² per trader) requires redundant N+1 chiller and air handling because a trading floor cannot tolerate a cooling outage during market hours. Acoustic tolerance is unforgiving (NC-30 maximum for live phone-traded business, NC-25 in executive boardroom and high-net-worth client space) because trader fatigue accumulates measurably across an eight-hour trading day and phone-trade clarity degrades sharply above NC-30. Information security requirements (APRA CPS 234) limit duct cross-section through secure zone walls and require physical access path documentation. Cash and bullion handling requires clean conditioned climate at controlled temperature and humidity inside a bullet-resistant vault envelope. Generator and UPS battery rooms supporting the life-safety standby supply require AS/NZS 60079 hazardous area zoning with spark-resistant ductwork and intrinsically safe motors. Hybrid retail-and-office tenancy mixes NCC Class 5 office with NCC Class 6 retail branch on the ground floor. And the NABERS Energy commitment agreement still applies because almost every bank HQ is in a Premium Grade or A-Grade host tower with an explicit rating obligation.
This guide is written for the people specifying that ductwork — the corporate property team at Commonwealth Bank, Westpac, NAB and ANZ; the facility engineers at Macquarie Group across the 50 Martin Place and Shelley Street campuses; the ASX operations team at 20 Bridge Street Sydney; the AustralianSuper, Aware Super and UniSuper facility leads in Melbourne; the workplace engineers at Atlassian, WiseTech Global, Computershare, Block and Tyro Payments; and the Tier 1 mechanical consultants from AECOM, Arup, WSP, Aurecon, Norman Disney & Young, Aurecon, Wood & Grieve, Lucid Consulting Engineers and the boutique specialists working on banking sector fitouts. It is not a guide to data centre HVAC — for the dedicated in-building or third-party data centre we recommend the SBKJ data centre HVAC duct manufacturing guide. It is not a guide to base building tower HVAC — for that we recommend the SBKJ commercial office tower HVAC duct guide. This guide covers the tenant fitout, the trading and dealing floor, the vault, the back-of-house and the regulatory layer that distinguishes financial sector HVAC from any other office HVAC environment.
The Australian banking and financial services landscape
The Australian financial services sector is the most concentrated in the developed world by market capitalisation share. The Big Four banks — Commonwealth Bank (ASX:CBA), Westpac (ASX:WBC), National Australia Bank (ASX:NAB) and ANZ (ASX:ANZ) — together hold over 75 percent of household deposits, well over 80 percent of mortgages, and dominate corporate and institutional banking. Macquarie Group (ASX:MQG) is the country's largest investment bank and asset manager with a global footprint. The Big Four plus Macquarie occupy roughly 1.2 million square metres of net lettable office space across Sydney, Melbourne and Brisbane head office campuses, before tenant fitout in regional and subsidiary buildings is counted. This is the largest single coordinated HVAC fitout customer cluster in the Australian commercial market.
Commonwealth Bank (ASX:CBA). Sydney headquarters at Darling Park, Tower 1 and Tower 2, with the Commonwealth Bank Place precinct at South Eveleigh containing the largest trader and dealer operations. CBA is the largest Australian bank by market capitalisation. Internal property standards target NABERS Energy 5.5+ stars and Indoor Environment 5 stars across the head office portfolio. The South Eveleigh campus integrates several Premium Grade towers with extensive trading floor, customer contact centre and corporate finance fitout.
Westpac (ASX:WBC). Sydney headquarters at Westpac Place, 275 Kent Street, with secondary Melbourne presence at 360 Collins Street. Westpac is the oldest Australian bank (founded 1817 as the Bank of New South Wales) and operates the BankSA and St George brands under the Westpac umbrella. The trading floor at Westpac Place is among the largest in Australian banking history with hundreds of trader workstations across multiple floor plates.
National Australia Bank (ASX:NAB). Melbourne headquarters at 700 Bourke Street Docklands (the Cbus Property NAB tower) with secondary Sydney presence at 105 Miller Street North Sydney. NAB is the largest business banking franchise in Australia and operates the BNZ subsidiary in New Zealand. The Bourke Street tower achieved NABERS Energy 5.5 stars at completion and is widely benchmarked for end-of-trip facility quality.
ANZ (ASX:ANZ). Melbourne headquarters at 833 Collins Street Docklands (the ANZ Centre) with secondary Sydney presence at 242 Pitt Street. ANZ has the most international footprint of the Big Four with operations across Asia-Pacific. The Docklands Centre integrates extensive trading floor, payments processing and corporate banking fitout. ANZ completed the acquisition of Suncorp Bank in 2024, expanding the Queensland operations footprint.
Macquarie Group (ASX:MQG). Sydney headquarters at 50 Martin Place and the One Shelley Street campus, with the Macquarie Asset Management and Macquarie Capital franchises operating globally. Macquarie is the largest Australian investment bank and one of the largest asset managers in the Asia-Pacific region with over $850 billion assets under management. The 50 Martin Place tower (the historic Money Box building heritage tower with modern integrated rear floors) and One Shelley Street together house the country's largest single investment banking trading floor and dealer turret operation.
Mid-tier banks. Bendigo and Adelaide Bank (ASX:BEN, Bendigo head office), Bank of Queensland (ASX:BOQ, Brisbane), the former Suncorp Bank (ASX:SUN, acquired by ANZ 2024, Brisbane), Heritage Bank (Toowoomba QLD), BankSA (Westpac-owned, Adelaide), BankWest (CBA-owned, Perth), Bank Australia (customer-owned), Beyond Bank, Newcastle Permanent, Greater Bank, People's Choice Credit Union, Police Bank and RACQ Bank together hold the next tier of branch network and corporate office presence across the country.
Global investment banks in Australia. Goldman Sachs Australia (Sydney 222 Exhibition Street and Governor Phillip Tower), Morgan Stanley Australia (Sydney Chifley Tower), JPMorgan Chase Australia (Sydney Grosvenor Place), UBS Australia (Sydney Chifley Tower — Swiss), Citigroup Australia (Sydney Citigroup Centre, 2 Park Street), Bank of America Merrill Lynch Australia (Sydney Governor Phillip Tower), Deutsche Bank Australia (Sydney Deutsche Bank Place, 126 Phillip Street — legacy), Barclays Australia (legacy), BNP Paribas Australia (Sydney Aurora Place), HSBC Australia (Sydney HSBC Centre, 580 George Street), Standard Chartered Australia, Nomura Australia (Sydney), Daiwa Australia (Sydney), Mizuho Australia (Sydney) and ING Direct (Dutch digital — Sydney). The global investment banks each maintain Australian trading floor and corporate finance operations, with most holding 2,000 to 8,000 square metres tenant fitout per location.
ASX and stock exchange infrastructure. ASX Limited (ASX:ASX) operates the primary Australian listing and trading platform from 20 Bridge Street Sydney with the Bondi data centre carrying the trading engine and co-location facility. Cboe Australia (formerly Chi-X Australia) operates the secondary lit exchange. AUSTRACLEAR operates the CHESS settlement system handling Australian cash equity, debt, derivatives and FX clearing. The ASX trading floor in the literal sense (open outcry) ceased decades ago — modern Australian trading is electronic with co-located server infrastructure — but the ASX headquarters at 20 Bridge Street continues to operate as the regulatory and operational hub.
Superannuation funds. AustralianSuper (Melbourne HQ, the largest super fund in Australia at over $300 billion assets under management), Australian Retirement Trust (the merged Sunsuper and QSuper entity — Brisbane HQ), Aware Super (NSW and Victoria nurses, teachers and government workers — Sydney HQ), UniSuper (university sector — Melbourne HQ), Hostplus (hospitality and tourism — Melbourne HQ), HESTA (health and community — Melbourne HQ), REST Industry Super (retail sector — Sydney HQ), Cbus (construction — Melbourne HQ), Sunsuper (now part of ART), TWUSUPER (transport workers), Equip Super, Mercer Super, AMP (ASX:AMP, retail wealth and banking — Sydney HQ), Insignia Financial (formerly IOOF — Melbourne HQ) and ASFA (Association of Superannuation Funds of Australia) collectively manage over $3 trillion of Australian retirement savings, with member contact centres, investment teams and corporate offices that together occupy several hundred thousand square metres of office space.
Fintech. Atlassian (ASX:TEAM and NYSE — Sydney headquarters at George Street and the upcoming Atlassian Central tower at Tech Central, the largest Australian tech company by market capitalisation), WiseTech Global (ASX:WTC — Sydney HQ, logistics software), Xero (ASX:XRO — Wellington NZ and Sydney, accounting SaaS), Computershare (ASX:CPU — Melbourne HQ, global share registry), Tyro Payments (ASX:TYR — Sydney, the largest independent EFTPOS provider), Block (Square Australia — Melbourne — Afterpay was acquired by Block in 2021), Zip Co (ASX:ZIP, BNPL), Latitude Financial (ASX:LFS), Judo Bank (ASX:JDO, SME challenger bank), Iress (ASX:IRE, financial software). The fintech cluster has driven significant trading-floor-like fitout density in Sydney Tech Central, Melbourne Cremorne and Brisbane Fortitude Valley, with engineering team workstation density and equipment cooling load approaching investment bank trading floor levels in some teams.
Regulators and industry bodies. The Australian Securities and Investments Commission (ASIC), the Australian Prudential Regulation Authority (APRA), the Reserve Bank of Australia (RBA), the Council of Financial Regulators, the Australian Banking Association (ABA), the Australian Financial Markets Association (AFMA), the Australian Investment Council and FINSIA (Financial Services Institute of Australasia). Each operates corporate offices that effectively mirror the regulated entity HVAC specification profile.
Regulatory framework — APRA, ASIC, RBA and the broader stack
The regulatory framework governing Australian financial services drives HVAC ductwork specification at several specific points. The framework is layered, with prudential and conduct regulation operating in parallel, and additional sector-specific overlays for banking, insurance, superannuation, payments and capital markets.
APRA Prudential Standard CPS 234 — Information Security. The single most influential standard for physical security and HVAC routing. CPS 234 applies to all APRA-regulated entities including all banks, all insurers, all super funds, all registrable superannuation entity licensees, all life companies and all private health insurers. It requires the regulated entity to maintain an information security capability commensurate with the size and complexity of its activities, including identification and protection of information assets, detection and response to information security incidents, and notification to APRA of material information security incidents. The HVAC ductwork implication is that any duct routing through a secure zone must not provide an unauthorised path for physical access, listening device introduction or information asset exposure. Practical specifications include maximum duct cross-section through secure zone walls (600 × 400 mm is the typical limit before structural bar grille is required), intumescent and acoustic gasket sealing at penetration, access panels installed only on the secure side, duct routing documented in the physical security plan and verified during physical penetration testing.
ASIC Regulatory Guide 109 — Operational Risk. Sets out ASIC expectations for operational risk management in Australian financial services licensees. Requires the licensee to identify, assess and manage operational risks including physical infrastructure resilience. The HVAC implication is that loss of cooling in a trading floor, dealing room or data centre is an operational risk event that must be managed through redundancy, monitoring and response procedures.
RBA Cash Handling Framework. The Reserve Bank operates the National Note Processing Centre and the bullion vault facilities, and contracts with commercial banks and cash-in-transit providers for the wholesale cash distribution network. RBA cash centre HVAC specification requires clean conditioned climate (18-22°C, controlled humidity), positive pressure relative to ambient to prevent dust infiltration, and bullet-resistant vault wall construction with through-wall duct chases sealed and rated.
ISO 27001 Information Security Management. The international standard adopted by virtually every APRA-regulated entity as the framework for information security management system certification. ISO 27001 Annex A includes physical security controls that overlap with APRA CPS 234 — physical entry controls, physical security perimeter, equipment siting and protection.
Banking Code of Practice (ABA). The voluntary code subscribed to by ABA member banks setting out customer service standards including discretion, privacy and confidentiality. Branch retail HVAC and HNW client meeting room HVAC specifications routinely incorporate Code-driven acoustic and privacy requirements.
Privacy Act 1988 and Australian Privacy Principles (APPs). Govern personal information handling by Australian Privacy Principles entities including all banks, all super funds and most fintechs. Drives confidentiality requirements for customer-facing space including HNW client meeting rooms and retail branch banking floor acoustic privacy.
Anti-Money Laundering and Counter-Terrorism Financing Act 2006. Administered by AUSTRAC. Drives cash handling and reporting obligations that flow through to physical cash centre design, transaction monitoring room HVAC and operational risk management.
Key HVAC standards governing the financial sector facility
The applicable HVAC ductwork standards for Australian financial sector facilities sit across a wider stack than for a generic Class A office, because the trading floor, vault, generator room and UPS battery room each carry additional specialist standards.
AS 1668.1 — Fire and Smoke Control in Buildings. The Australian Standard for fire and smoke control in mechanical ventilation systems. Applies to stairwell pressurisation, atrium smoke management, fire dampers at zone boundaries and smoke-rated ductwork. Mandatory for any building above 25 m effective height.
AS 1668.2 — Mechanical Ventilation in Buildings. The Australian Standard for mechanical ventilation rates and outdoor air requirements. Office floor plate minimum 10 L/s per person breathing zone outdoor air. Trading floor at the same per-person rate but with much higher total supply driven by sensible cooling load. Retail branch at 10 L/s per person with queuing-zone increment. Restaurant and cafeteria per AS 1668.2 retail rates. Toilet, shower and end-of-trip exhaust at the AS 1668.2 schedule rates.
AS 4254 — Ductwork for Air Handling Systems. The Australian Standard for ductwork construction. Specifies metal gauges, reinforcement, joining, leakage classes and pressure classifications. Routinely paired with SMACNA and DW/144 in Australian Premium Grade specifications. Class C leakage (≤6% at 500 Pa) is the typical NABERS-target tower base building specification. Class A leakage (≤3%) is specified for stairwell pressurisation, atrium smoke exhaust and secure zone ductwork.
AS 1530.4 — Fire Resistance Tests. The fire resistance rating standard for ductwork penetrating fire-rated walls and floors. Smoke management ductwork in atrium exhaust typically requires 600°C for 120 minutes. Stairwell pressurisation duct typically requires 300°C for 60 minutes. Vault wall penetration matches the vault FRL.
AS 1851 — Routine Service of Fire Protection Systems and Equipment. The Australian Standard for routine inspection of fire dampers, fire-rated ductwork, smoke management systems and related fire protection equipment. Annual inspection and testing is mandatory for the life of the building.
AS/NZS 60079 — Explosive Atmospheres. The Australian and New Zealand adoption of the IEC 60079 hazardous area classification series. Applies to UPS battery rooms (hydrogen gassing in lead-acid charge cycles), generator rooms (diesel fuel handling), gas appliance rooms and any zone where flammable atmospheres may form. Zone 2 is the typical classification above a UPS battery bank.
AS 1940 — Storage and Handling of Flammable and Combustible Liquids. Applies to the day tank diesel storage for the standby generator. Drives the ventilation, bunding and fire protection design for the generator room and approach area.
AS 3000 — Wiring Rules. The Australian and New Zealand electrical installation standard. Coordinates with HVAC ductwork at electrical riser shafts, switchroom ventilation and motor control centre cooling.
AS/NZS 5139 and NFPA 855 — Battery Energy Storage Systems. Apply to lithium-iron-phosphate and other lithium chemistry UPS battery installations replacing legacy lead-acid. Different zoning, ventilation and fire protection requirements compared with lead-acid. Increasingly relevant as Tier IV UPS systems migrate to lithium.
AS 2107 and AS 1276 — Acoustic. AS 2107 sets recommended ambient noise criteria across building space types. AS 1276 covers sound transmission and acoustic separation. Together they drive the NC envelope and acoustic ductwork specification — NC-25 in boardroom and HNW client space, NC-30 in trading floor and dealing room, NC-30 in open-plan, NC-35 in branch retail, NC-40 in back-of-house.
AS 4072.1 and AS 4072.3 — Penetration Sealing. Apply to service penetrations including HVAC duct penetrations through fire-rated walls and floors. Mandatory for any duct penetration through an FRL-rated barrier.
AS 4214 — Gaseous Fire Suppression Systems. Applies to clean agent gaseous suppression in data centre, server room, secure document storage and trading floor IT cabinet zones. HVAC ductwork must coordinate with the suppression system — supply and exhaust dampers close automatically on discharge to maintain agent concentration.
AS 2118 — Sprinkler Systems. Applies to wet pipe sprinklers throughout the occupied space. HVAC ductwork must coordinate with sprinkler heads — duct must not obstruct sprinkler coverage and duct surface temperatures must not trigger sprinkler heads under normal operation.
AS 1428.1 — Design for Access and Mobility. The Australian Standard for disability discrimination compliance in built environment. Applies to lobby, branch banking floor accessibility, accessible toilet ventilation and accessible meeting room comfort.
AS 1735 — Lifts, Escalators and Moving Walks. Covers lift shaft venting that interfaces with smoke management ductwork at the head of the shaft.
ASHRAE Standard 62.1 — Ventilation for Acceptable Indoor Air Quality. The international ventilation rate reference often cited in Premium Grade Australian specifications alongside AS 1668.2.
ASHRAE Standard 90.1 — Energy Standard for Buildings. The international energy efficiency reference often cited in Premium Grade Australian specifications alongside NCC Section J and the NABERS commitment.
NABERS Energy and Indoor Environment. The Australian National Built Environment Rating System. Premium Grade host towers target NABERS Energy 5.5 to 6 stars and Indoor Environment 5 stars. Tenant fitout NABERS rating is a separate scheme that bank, super fund and fintech tenants increasingly commit to.
Workplace Exposure Standards (WES). Safe Work Australia exposure standards relevant to the financial sector facility include CO₂ at 5000 ppm TWA (relevant on the dense trading floor where 1-2 m² per trader can lift CO₂ rapidly without sufficient ventilation), R32, R410A and R744 refrigerants (chiller plant), formaldehyde 1 ppm STEL on new build (fitout materials off-gassing), ozone 0.1 ppm (laser printer and UPS battery formation cycles) and hydrogen 25% LEL trigger (lead-acid UPS battery gassing).
Investment bank trading floor — the most demanding HVAC zone
The investment bank trading floor is the most demanding office HVAC environment in the Australian commercial property market by every measure — cooling load, redundancy, acoustic envelope, occupancy density, hours of operation and tenant intolerance for failure. Macquarie Group at One Shelley Street, Goldman Sachs at Governor Phillip Tower, Morgan Stanley at Chifley Tower, JPMorgan Chase at Grosvenor Place, UBS at Chifley Tower and the Big Four corporate dealing rooms together operate the most demanding floor plates in the Australian commercial portfolio.
Trader workstation density. A modern investment bank trading floor typically operates at 1 to 2 square metres per trader workstation in the densest dealing room zones, rising to 3 to 5 square metres in the analyst and support functions. A single 1,500 square metre trading floor can therefore hold 300 to 500 trader and support workstations during peak market hours. Each workstation typically carries four to six monitors (a sell-side dealer turret at a major investment bank routinely runs six monitor screens plus the dealer turret display), a phone or dealer turret voice device, the desktop computing for the trading platform, and supporting peripherals. The combined sensible heat load per workstation is 400 to 600 watts at the equipment level alone, before occupant heat (100 watts per seated person at metabolic rate 1.2 met) and lighting heat (5 to 10 watts per square metre at LED specification).
Internal heat gain. The combined internal sensible cooling load on a dense trading floor is 100 to 300 W/m² depending on workstation density and screen count. This is two to four times the cooling load of a generic open-plan office (typically 40 to 80 W/m²). The HVAC system must extract this heat continuously during market hours and maintain inlet supply at the design temperature without thermal stratification or hot spots.
Inlet supply temperature. Trading floors are typically held at 22 to 24°C dry bulb in the occupied zone with ±0.5°C tolerance. The supply temperature is typically 14 to 16°C at the diffuser depending on the air distribution strategy. The tight tolerance is driven by trader comfort sensitivity — a temperature variation of 1°C across a trading floor produces complaints, and traders are unusually sensitive to thermal variation because their attention is on the screen and any peripheral discomfort is amplified.
Hot-aisle and cold-aisle separation. In the densest dealing rooms (above 200 W/m² internal heat gain), hot-aisle and cold-aisle separation is now standard. The principle is borrowed from data centre design — cool supply air is delivered to the front of the row of workstations, the hot exhaust air rises from the back of the row to a ceiling-level return, and the two air streams are kept separated by row geometry and partition. The acoustic boundary at the back of the row helps trade-floor neighbours hear each other clearly without ambient noise from the row behind. SBKJ SB-ZF1500 stitchwelder is specified for the welded plenum sections in the hot-aisle return path because air leakage between hot and cold aisles defeats the separation calculation.
Raised access floor. Raised access floor is now standard on Australian investment bank trading floors. Cool supply air is delivered into the underfloor plenum at 14 to 16°C and discharges through floor grilles or perimeter slot diffusers into the occupied zone. The cable management for trader workstations (power, data, dealer turret) runs through the same underfloor plenum. The floor plate construction is typically 450 to 600 mm raised tile on adjustable pedestals. The underfloor plenum acts as the primary supply duct and the trading floor proper acts as the return air plenum, with high-volume return air paths via the ceiling void.
Redundancy N+1. Trading floor cooling is mandatory N+1 redundant at minimum, with N+2 specified for the highest-revenue dealing rooms. This means the chiller plant capacity, the air handling unit count and the riser shaft capacity all carry one or two units of spare beyond the design demand. A single chiller or AHU failure during market hours must not interrupt the supply to the trading floor. Maintenance is scheduled outside market hours and the standby unit carries the load during planned maintenance.
Acoustic NC-30 maximum. The trading floor acoustic envelope is the most demanding in the building. Phone-trade clarity degrades sharply above NC-30 because the human voice frequency band overlaps with HVAC noise above this level. Trader fatigue accumulates measurably across an eight-hour trading day in higher-noise environments. Investment bank dealing rooms holding live phone-traded business routinely specify NC-30 at the workstation height and NC-25 in the dealer turret zone where multiple simultaneous phone conversations occur. Achievement requires internally lined supply ductwork (25 to 50 mm acoustic absorption inside galvanised shell), duct silencer attenuator upstream of every diffuser, large-cross-section duct sized for velocity below 6 m/s in branches, and seamless welded plenum sections delivered through the SBKJ SB-ZF1500 stitchwelder where air leakage and sound leakage must be minimised simultaneously.
24/7 operation envelope. A global investment bank dealing room operates across all major market sessions. Sydney is well positioned for the Asia-Pacific opening, the European afternoon overlap and the New York night-trade overlap. The dealing floor therefore typically runs 24/7 with reduced staffing on the overnight watch — but cooling load remains material because workstation equipment runs continuously even when the workstation is unattended. The HVAC system must maintain envelope and air quality through the entire week.
CO₂ at the dense workstation cluster. CO₂ accumulation at 1 to 2 m² per trader can rise rapidly without sufficient outdoor air rate. The AS 1668.2 minimum 10 L/s per person is enforceable but at trading floor density the practical outdoor air requirement is closer to 12 to 15 L/s per person for sustained sub-1000 ppm CO₂. The WES TWA limit is 5000 ppm, which is far above any cognitive comfort target — the trading floor cognitive performance target is typically below 1000 ppm and ideally below 800 ppm, well inside the WES envelope.
Bank HQ dealing room and back office
The Big Four bank corporate dealing rooms differ from the global investment bank trading floors in scale and mix. A typical Big Four Australian dealing room operates 100 to 250 trader workstations across rates, FX, equities, commodities and credit, with adjacent analyst, salesperson and support functions running another 100 to 300 workstations on a contiguous floor plate. The acoustic and cooling envelope is broadly similar to the global investment bank specification but the regulatory overlay (APRA prudential, Banking Code customer-facing functions on adjacent floors) adds additional constraints.
Bank HQ back-office operations include payments processing, transaction monitoring, AML compliance, loan operations, customer contact centre and credit risk monitoring. These functions typically run 10 L/s per person ventilation per AS 1668.2 at open-plan office workstation density (1 person per 8 to 12 m²). The acoustic envelope is NC-30 to NC-35 depending on whether the function involves phone work. Customer contact centres carry the highest acoustic sensitivity because phone clarity is the primary work output — typically NC-30 with internally lined supply duct and attenuator at every diffuser.
Transaction monitoring rooms and AML compliance space frequently require additional information security overlay per APRA CPS 234 because the work involves direct handling of personally identifiable customer information. Duct routing through the secure zone wall is restricted to small cross-section (maximum 600 × 400 mm without structural bar grille), penetrations sealed with intumescent and acoustic gasket, access panels installed only on the secure side.
Customer contact centre HVAC frequently includes redundancy because a contact centre is a regulatory-mandated channel for incident reporting, customer complaint handling and high-value transaction confirmation. A contact centre cooling failure during business hours can trigger ASIC complaint resolution timeline obligations. The standby HVAC capacity is therefore typically N+1 at the AHU level.
ASX, Cboe and the modern stock exchange floor
The Australian Securities Exchange ceased open-outcry trading in the 1980s and the modern Australian equity, derivative and FX markets are entirely electronic. ASX Limited (ASX:ASX) operates the primary exchange from 20 Bridge Street Sydney with the trading engine and co-location facility located at the ASX Australian Liquidity Centre in Sydney's Bondi precinct. Cboe Australia (formerly Chi-X Australia) operates the secondary lit equity exchange. AUSTRACLEAR operates the post-trade settlement system handling cash equities, fixed income, derivatives and FX clearing.
The modern ASX floor plate at 20 Bridge Street is a corporate office environment rather than an open-outcry trading floor. The HVAC specification mirrors a Premium Grade Class A office with additional information security and operational risk overlays driven by the exchange's role as critical financial infrastructure. The operations centre, market surveillance room, listings team workspace and corporate functions occupy a multi-floor tenancy.
The ASX Bondi data centre and co-location facility is the actual location of the trading engine and exchange member co-located server infrastructure. This is the highest-value-density HVAC environment associated with the Australian stock exchange — covered separately in the SBKJ data centre HVAC duct manufacturing guide. The HVAC specification for the data centre is the standard Tier III to Tier IV envelope with N+1 chiller and AHU redundancy, hot-aisle/cold-aisle containment and 22 to 27°C cold-aisle supply.
Co-location member server cages at the Bondi facility are leased to brokerages, market makers and algorithmic trading firms requiring sub-microsecond latency to the trading engine. The HVAC ductwork specification for the co-location floor plate is the same as for any Tier III to Tier IV data centre.
Exchange member firm trading operations occupy office tenant space across the Sydney CBD with similar HVAC profile to the global investment bank trading floor — high workstation density, multi-monitor configurations, dealer turret voice systems and NC-30 acoustic envelope.
Bullion vault, cash counting room and RBA cash centre
The bullion vault, cash counting room and Reserve Bank cash centre HVAC envelope is the most security-constrained in the financial sector facility. The combined values, the physical security constraints and the regulatory documentation requirements drive a specialist ductwork specification distinct from the general office HVAC.
Bullion vault. The Big Four bank bullion holdings, the Perth Mint gold storage, the major private bullion dealers (ABC Refinery, Pallion, Australian Bullion Company) and the Reserve Bank gold vault all operate climate-controlled vault interiors at 18 to 22°C dry bulb, 30 to 50% relative humidity. The climate envelope prevents tarnish on silver bars and on some platinum-gold alloy bars, prevents document deterioration in adjacent safe deposit areas, and prevents condensation on cold metal surfaces when the vault door is opened to a warmer corridor.
Vault HVAC ductwork is typically 304 stainless steel via the SBKJ SB-ZF1500 stitchwelder for the welded seamless plenum sections inside the vault interior, with bullet-resistant duct chase construction at the vault wall penetration, and SBKJ SBAL-V galvanised duct in the approach plant room and ceiling void. The duct penetration through the vault wall is sealed with intumescent material and acoustic gasket, sleeve-rated to the vault wall FRL per AS 1530.4, and documented in the physical security plan.
Redundant N+1 cooling is mandatory because vault contents have effectively infinite economic value and cannot be evacuated during a cooling outage. A loss of cooling at 30°C ambient with a sealed vault can drive interior temperature above the design envelope within hours, risking metallurgical degradation. The standby AHU is typically held on automatic transfer through the BMS with a five-minute changeover window.
Cash counting room. Major bank cash centres operate cash counting and processing rooms where cash-in-transit deliveries are received, counted, sorted, sealed and dispatched. The HVAC specification is clean conditioned supply at 18 to 22°C with positive pressure relative to the loading dock to keep dust out, and a controlled exhaust path. Acoustic separation from adjacent zones is significant because cash counting equipment produces high-frequency mechanical noise. The ductwork is 304 stainless in the secure zone interior via SBKJ SB-ZF1500 and galvanised through SBKJ SBAL-V in the approach plant room.
RBA cash centre. The Reserve Bank of Australia operates the National Note Processing Centre and related cash distribution infrastructure under a stringent security envelope. HVAC specification follows the major bank cash centre profile with additional documentation and security clearance requirements for contractor access.
Safe deposit box room. Branch-level safe deposit box rooms (declining in number across the Big Four but still operating at major regional branches and at private banking facilities) hold customer items including documents, jewellery and currency. The HVAC envelope is 18 to 22°C, 40 to 50% RH with clean filtered supply and acoustic separation. The room is typically a single small vault adjacent to the customer-facing private banking space.
HNW private banking and client meeting room
High-net-worth private banking is a growth segment for the Big Four and Macquarie Bank, with dedicated client floor plates at the main corporate campuses and at premium-suburb satellite offices. The HVAC specification for HNW client space is driven by discretion, acoustic privacy and a hospitality-grade thermal comfort envelope.
Acoustic NC-25. HNW client meeting rooms specify NC-25 maximum ambient noise because the confidential conversation is the work product. Achievement requires internally lined supply ductwork, duct silencer attenuator upstream of every diffuser, large-cross-section duct sized for velocity below 5 m/s in branches, and acoustic separation from adjacent rooms. The wall and door construction is typically Rw 50+ acoustic-rated and the duct routing must not compromise that rating through poorly sealed penetrations.
Discreet routing. The duct route from the AHU to the HNW meeting room must avoid passing through public-access ceiling void or common areas where service personnel could potentially access the duct route. The duct is typically routed through the secure office floor ceiling void with documented physical security overlay.
Hospitality-grade comfort. Supply temperature, return temperature and humidity are held to a tight envelope (22°C ±0.5°C, 40-55% RH) with dedicated VAV terminal per room rather than zone-shared VAV. The thermal comfort target is closer to a five-star hotel meeting room than to a generic office boardroom.
AV control room. HNW client meeting rooms typically integrate Bloomberg, Refinitiv Eikon, Morningstar, Iress and proprietary bank trading platform terminals. The AV control room providing the source for these terminals requires clean redundant supply HVAC, MERV 13+ filtration to keep dust off display surfaces, and acoustic separation from the meeting room proper.
Bank branch retail floor
The bank branch retail floor is a Class 6 retail tenancy under the National Construction Code and the HVAC envelope differs from the upstairs corporate Class 5 office. AS 1668.2 sets minimum 10 L/s per person breathing zone outdoor air with increased queuing-zone ventilation at peak retail hours.
Public access drives security overlay. Supply and return openings into the public banking floor must not provide an unsecured path to the staff-only office area, the cash counting room or the safe deposit area. Duct penetrations through secure zone walls are restricted in cross-section and sealed per APRA CPS 234.
ATM enclosure HVAC is a specialist sub-requirement. The cash-handling machinery inside the ATM operates within an 18 to 26°C envelope and the enclosure carries a small packaged dedicated air conditioner with a supplementary supply duct branch from the branch supply. ATM enclosure faults from temperature excursion are an operational issue across the Australian branch network during summer heatwaves.
Customer queuing zone ventilation must hold AS 1668.2 occupant rate during peak hours (typically 10:00 to 14:00 weekdays). The queuing-zone occupancy can spike at 1 to 2 m² per customer during salary processing days and quarterly tax periods. Demand-controlled ventilation tied to door counters is now common.
Acoustic NC-35 in the public banking hall. The acoustic envelope must allow private conversation between the customer and the teller without creating a quiet space where conversation at the adjacent teller window is audible. The acoustic balance is delicate and the supply ductwork specification (internally lined supply, attenuator selection) is one of the levers.
The duct material is galvanised through SBKJ SBAL-V with internally lined sections at the public-facing supply where NC-35 is held. The cash counting and safe deposit interior space uses 304 stainless via SBKJ SB-ZF1500.
Generator room HVAC — AS/NZS 60079 and AS 1940
The bank HQ standby generator room serves life-safety standby and resilience continuity for the trading floor, dealing room, contact centre and data centre. A typical Tier 1 bank HQ runs a 1 to 4 MW diesel generator set on the ground or basement level, with the radiator on roof or external wall and the day tank diesel storage in a dedicated bunded room. The HVAC specification is driven by AS/NZS 60079 hazardous area zoning, AS 1940 flammable liquid storage and the generator manufacturer's air supply and exhaust requirements.
Combustion air supply. A 1 MW class 24-hour standby diesel set typically consumes 8 to 12 m³/s combustion air at full load, with corresponding cooling air at 25 to 35 m³/s flowing across the engine and radiator. The combustion air supply ductwork is sized for the full demand with weather-protected louvre intake at the external wall.
Radiator heat exhaust. The radiator exhausts heat to atmosphere via a ducted path to the roof or external wall. The duct is typically galvanised through SBKJ SBAL-V at heavy gauge (1.2 to 1.5 mm) sized for the radiator pressure drop. Acoustic attenuation is typically required because the radiator fan noise is significant at the discharge point.
Generator room ventilation. When the generator is not running, the generator room requires nuisance ventilation to clear residual diesel vapour from the day tank vent and from leakage at fuel line joints. AS/NZS 60079 may classify the immediate envelope around the fuel system as Zone 2. SBKJ spark-resistant manufactured ductwork is specified in the Zone 2 envelope.
Day tank diesel storage. AS 1940 governs the day tank construction, bunding and ventilation. The day tank room is typically a small adjacent space with dedicated exhaust and AS/NZS 60079 Zone 2 classification around the tank vent.
Acoustic. The generator room acoustic envelope at the external wall is typically held below 65 dBA at 1 m from the louvre to comply with NSW EPA, EPA Victoria or relevant state environment regulator noise limits for the precinct. Internal acoustic at the generator room is unrestricted because the room is unoccupied during operation, but the radiator discharge and combustion air intake noise affects the surrounding precinct.
UPS battery room HVAC — hydrogen, lithium and AS/NZS 60079
The UPS battery room supporting the bank HQ trading floor, data centre and contact centre uninterruptible power supply is one of the most specialised HVAC zones in the facility. The specification depends critically on battery chemistry — flooded lead-acid, valve-regulated lead-acid (VRLA) or lithium-iron-phosphate.
Lead-acid hydrogen gassing. Flooded and VRLA lead-acid batteries produce hydrogen gas during charge cycles, with peak gassing during equalisation charge. The hydrogen accumulates in the room atmosphere unless ventilated. AS/NZS 60079 typically classifies the envelope above the battery bank as Zone 2. The hydrogen lower explosive limit is 4.0% v/v and the design target is to keep concentration below 25% of LEL (equivalent to roughly 1.0% v/v hydrogen) — well below the explosive envelope.
Mechanical ventilation 5-12 ACH. The room is mechanically ventilated at 5 to 12 air changes per hour with spark-resistant exhaust fans (motor outside the airstream or intrinsically safe motor inside) and spark-resistant ductwork through the Zone 2 envelope. SBKJ spark-resistant manufactured ductwork is specified for the immediate envelope, transitioning to standard galvanised SBKJ SBAL-V in the non-Zone-2 portion of the run.
Hydrogen detection. A hydrogen detector in the room atmosphere triggers high-rate ventilation at 25% LEL and triggers BMS alarm at 50% LEL. The detector and trigger logic is integrated into the BMS for incident response.
Battery room cooling. Lead-acid battery life is highly temperature-sensitive — a 10°C rise above 25°C halves the battery service life. The room is typically held at 22 to 25°C with redundant cooling. Mechanical cooling is via dedicated AHU with N+1 redundancy. The cooling supply ductwork is non-spark-resistant in the upper part of the room (above the battery bank Zone 2 envelope) but the exhaust ductwork through the Zone 2 envelope is spark-resistant.
Lithium-iron-phosphate UPS. Lithium chemistry UPS systems to AS/NZS 5139 and NFPA 855 do not produce hydrogen gas under normal operation. The hazardous area classification differs from lead-acid — typically no Zone classification under normal operation, but with thermal runaway response requirements driving smoke detection, gas detection (for hydrogen fluoride and other thermal runaway products), high-rate exhaust ventilation on alarm, and fire suppression coordination. The HVAC ductwork through a lithium UPS room is typically standard galvanised with high-rate exhaust capability on alarm.
Battery acid spill. Flooded lead-acid battery rooms additionally require spill containment, eyewash and dedicated drainage. The HVAC specification includes corrosion-resistant materials in the immediate envelope above the battery rack — 304 stainless ductwork via SBKJ SB-ZF1500 is sometimes specified in addition to spark resistance to address both hazards simultaneously.
Data centre, server room and telecoms room
The in-building data centre and server room in a bank HQ holds the core banking system, the trading platform infrastructure, the contact centre call recording, the customer database, the trade-floor analyst workstation infrastructure and the security CCTV recording. The HVAC specification is the Tier III to Tier IV data centre envelope with N+1 chiller, N+1 AHU and hot-aisle/cold-aisle containment.
The dedicated data centre HVAC specification is covered in the SBKJ data centre HVAC duct manufacturing guide. The key points relevant to the bank HQ context are that the data centre is treated as a separate cooling and ductwork system from the office floor plate, the duct material is typically 304 stainless via SBKJ SB-ZF1500 for the welded plenum and galvanised via SBKJ SBAL-V for the supply and exhaust, and the duct leakage class is AS 4254 Class A for the containment-critical sections.
Server room (small in-building data closet) carries similar HVAC requirements at smaller scale — dedicated cooling at 22 to 27°C cold-aisle supply, N+1 redundancy, hot-aisle containment if more than 10 server racks. Telecoms room (fibre splice, telco backbone, building riser) typically operates at 20 to 25°C with dust-controlled clean supply and acoustic separation.
The telecoms room HVAC supply is from a dedicated fan coil unit or VAV with MERV 13+ filtration to keep dust off the fibre splice equipment. The duct material is galvanised through SBKJ SBAL-V with optional internally lined section if acoustic separation is required from adjacent space. The room is typically positive pressure relative to the corridor to prevent dust ingress when the door opens.
AV control room serving Bloomberg, Refinitiv Eikon, Morningstar terminals carries similar specification — clean redundant supply, dust filtration, acoustic separation, redundant cooling because the AV control room downtime takes the trading and HNW client meeting rooms offline.
Boardroom and executive amenity
The bank HQ boardroom, audit committee room and executive office floor plate operate at NC-25 acoustic, demand-controlled ventilation for variable-occupancy meetings, premium thermal comfort and discreet AV integration.
Boardroom NC-25. The acoustic envelope is achieved with internally lined supply ductwork, duct silencer attenuator upstream of every diffuser, large-cross-section duct sized for velocity below 5 m/s in branches, and acoustic separation from adjacent rooms via Rw 55+ wall construction. The supply diffuser is typically a swirl diffuser or large-format slot for low-velocity supply with minimal direct draught on board members.
Demand-controlled ventilation. Boardroom occupancy varies from zero (most of the time) to 20-30 people during board meetings. The ventilation is modulated via CO₂ sensor or occupancy sensor to deliver AS 1668.2 outdoor air rate per actual occupancy. The supply VAV terminal is dedicated to the boardroom rather than shared with adjacent zones.
Premium thermal comfort. Supply temperature and humidity are tightly controlled (22°C ±0.5°C, 40-55% RH) with rapid response to occupancy change so that the room is comfortable within 5 minutes of meeting start regardless of prior unoccupied period.
AV integration. Modern boardrooms integrate video conferencing, large-format displays, in-room microphones and ceiling speakers. The HVAC ductwork must not interfere with AV — duct runs avoid ceiling tile zones where ceiling speakers are mounted, duct silencer selection considers AV pickup acoustic frequency, and supply diffuser placement avoids direct draught on the cameras and microphones.
Executive office. Individual executive offices on the C-suite floor typically run dedicated VAV per office for individual climate control, with NC-25 acoustic envelope and premium finish supply diffuser. The duct routing avoids ceiling tile penetrations visible from the executive desk and the supply diffuser is typically architecturally integrated.
Kitchen, cafeteria and worker amenity
The bank HQ staff cafeteria, executive dining room and tenant kitchenette HVAC follows NFPA 96 commercial kitchen exhaust principles for the cooking zones, with AS 1668.2 ventilation for the dining and amenity zones.
Commercial cooking exhaust uses 304 stainless steel grease duct via the SBKJ SB-ZF1500 stitchwelder for the welded seamless construction required by NFPA 96. The grease duct routing rises from the cooking hood to a roof or external wall discharge with grease filters, access panels at every change of direction, and dedicated cleaning access. The make-up air supply for the kitchen exhaust is delivered through SBKJ SBAL-V galvanised supply ducting from the dedicated kitchen make-up air handler.
Dining area ventilation is AS 1668.2 retail rate. Acoustic NC-40 envelope. Supply via standard galvanised SBKJ SBAL-V duct. Buffet line warming heat is exhausted through dedicated extract above the buffet line.
Worker amenity and lunchroom HVAC is separated from the trading floor air supply because food smells and lunch-noise transfer onto the trading floor is unacceptable to traders. Dedicated supply and exhaust per zone. Acoustic separation Rw 45+. The duct routing must coordinate with the trading floor acoustic envelope so that lunchroom activity does not penetrate the NC-30 trading floor target.
Print, production, mailroom and secure storage
The bank HQ print and production room, mailroom and secure document storage rooms each carry specialist HVAC requirements driven by contamination control, security and emergency response.
Print and production. Laser printer banks produce ozone (WES 0.1 ppm) and toner particulate. Dedicated extract through filtered exhaust is mandatory. The extract is sized for the print room occupancy and equipment count, with HEPA filtration option for high-volume print operations. The supply is clean filtered MERV 13+. The ductwork is galvanised through SBKJ SBAL-V.
Mailroom. The post-September-11 mailroom screening practice continues at Big Four head offices, the ASX and the global investment bank operations. Incoming mail is screened in a dedicated mailroom with clean filtered supply, dedicated exhaust through HEPA filter, and physical containment in case of suspicious-package response. The room is held at slight negative pressure relative to the corridor to prevent contamination escape. HEPA-filtered exhaust is the typical specification. The ductwork is galvanised through SBKJ SBAL-V with HEPA frame on the exhaust path.
Secure document storage. Long-term document storage rooms holding paper records (board minutes, legal hold documents, customer KYC files, audit working papers) operate at 18 to 22°C, 40 to 50% RH with clean filtered supply MERV 13+ and acoustic separation. The HVAC is straightforward but the climate envelope must be held tightly because paper records degrade rapidly outside this envelope. Fire suppression coordination with AS 4214 gaseous suppression is typical where paper records are critical.
Super fund offices — Melbourne and Sydney
Australian superannuation fund offices form a distinct customer cluster within the financial services facility universe. AustralianSuper, Aware Super, UniSuper, Hostplus, HESTA, REST, Cbus and ART (the merged Sunsuper-QSuper entity) together operate dozens of corporate offices across Australia, anchored by AustralianSuper's Melbourne head office at 50 Lonsdale Street.
Super fund office HVAC is generally Premium Grade or A-Grade office tenant fitout with three sector-specific overlays. First, member contact centre operations require NC-30 acoustic envelope to support phone-based member service. Second, investment team workstation density approaches dealing room density in the front-office portfolio management teams. Third, APRA CPS 234 applies because super funds are APRA-regulated RSE licensees, driving the same information security and duct routing constraints as for bank HQ.
AustralianSuper at 50 Lonsdale Street Melbourne operates the largest single super fund office floor plate in Australia, with the investment, member services, operations and corporate functions occupying a multi-floor tenancy. NABERS commitment is typically 5+ stars Energy and 5 stars Indoor Environment. The investment team space carries trading-floor-like equipment density and acoustic requirements; the member services contact centre operates at NC-30 with redundant cooling.
Aware Super operates the Sydney CBD head office with similar fitout profile. UniSuper and Cbus at their Melbourne head offices follow comparable specifications. The super fund offices also typically integrate board and committee rooms with NC-25 acoustic, member meeting rooms with privacy and discretion, and trustee meeting space.
The HVAC ductwork for a super fund corporate office is generally manufactured on the SBKJ SBAL-V galvanised line for the general supply, return and exhaust, with 304 stainless SBKJ SB-ZF1500 plenum sections for the acoustically critical contact centre and investment team zones, and dedicated specification for the APRA CPS 234 secure document storage and IT zones.
Fintech offices — Atlassian, WiseTech and the Australian tech cluster
The Australian fintech and broader technology sector is anchored by Atlassian (ASX:TEAM and NYSE), WiseTech Global (ASX:WTC), Computershare (ASX:CPU), Xero (ASX:XRO with dual Wellington-Sydney HQ), Tyro Payments (ASX:TYR), Block Australia (formerly Square and Afterpay — Melbourne), Zip Co (ASX:ZIP), Latitude Financial (ASX:LFS), Judo Bank (ASX:JDO) and Iress (ASX:IRE). The fintech office fitout has driven a measurable shift in tenant HVAC expectations across the Sydney Tech Central, Melbourne Cremorne and Brisbane Fortitude Valley innovation precincts.
Engineering team workstation density. Modern fintech engineering teams operate at 4 to 8 m² per workstation with three to four monitors per engineer plus desktop computing. The cooling load is lower than an investment bank trading floor but materially above generic office (typically 60 to 120 W/m²). The HVAC system must hold supply at the design envelope through extended operation hours because engineering teams routinely work outside standard business hours.
Operations and on-call response. Software engineering teams operating production financial systems (payment processing, trading platforms, account management) typically run on-call rotations with 24/7 response capability. The office HVAC must support extended-hours operation with redundant cooling for the operations response space.
Hybrid work and activity-based working. Fintech offices have led the activity-based working fitout style with diverse workpoint types — collaboration zones, focus pods, video conferencing rooms, social spaces, breakout zones. The HVAC zoning is more granular than traditional open-plan office with dedicated VAV per activity zone.
NABERS commitment. Fintech tenant fitouts increasingly commit to NABERS Tenancy ratings at 5+ stars. The ductwork specification follows the broader Premium Grade tenant fitout pattern — internally lined supply duct in acoustic-sensitive zones, MERV 13+ filtration, demand-controlled ventilation tied to occupancy sensors.
Atlassian Central. The Atlassian Central tower at Tech Central Sydney (under construction at the time of writing) is the largest single Australian tech corporate office project. The hybrid timber-and-steel structure includes extensive amenity, engineering team floors, social spaces and the Atlassian corporate office. NABERS commitment is at the upper end of the rating range.
Materials specification — galvanised, stainless, spark-resistant
The bank HQ and financial sector facility material specification follows a hierarchy driven by service environment, acoustic envelope, hazardous area zoning and security routing.
Galvanised G90 (Z275). The primary material for general office, branch retail, lobby, corridor, kitchen make-up air and back-of-house supply, return and exhaust. SBKJ SBAL-V auto duct lines run G90 galvanised at 0.6 to 1.5 mm continuously and produce rectangular duct with integrated TDF flange in a single pass. SBKJ SBSF-1525 super auto line is specified for higher-throughput operations where base building and tenant fitout are running concurrently. For the high-volume bank HQ project (combined base building plus multi-floor tenant fitout), the SBSF-1525 production rate handles the duct volume in roughly half the time of a single SBAL-V line.
304 stainless steel. Specified for the bullion vault interior plenum, the cash counting room secure zone, the kitchen grease exhaust (NFPA 96), the end-of-trip facility shower exhaust, the acoustic NC-30 trading floor plenum where welded seamless joints are mandatory for combined air and sound leakage, and the sound attenuator construction. The SBKJ SB-ZF1500 stitchwelder is specified for the welded plenum sections because mechanical joints leak both air and sound, while continuous welded joints produce the lowest acoustic and air leakage performance. The SB-ZF1500 produces 304 stainless plenum at 0.8 to 1.5 mm thickness with continuous welded seams and is the production line component for the acoustic and security-sensitive zones.
Spark-resistant manufactured ductwork. Specified for the AS/NZS 60079 Zone 2 envelope above the UPS battery bank and around the generator room day tank diesel storage. SBKJ produces spark-resistant ductwork to the AS/NZS 60079 specification, with non-sparking interior surfaces and bonded earthing across joints to dissipate static charge. The spark-resistant duct transitions to standard galvanised SBKJ SBAL-V at the boundary of the Zone 2 envelope.
Internally lined galvanised. Specified in NC-30 and lower acoustic zones — trading floor, dealing room, customer contact centre, boardroom, HNW client meeting room. The internal lining is 25 to 50 mm acoustic absorption bonded inside the galvanised shell. The acoustic performance is dramatic and the lining is run through the SBAL-V production cycle as a standard variant of the galvanised duct.
Spiral round duct. The SBKJ SBFB-1500 spiral tubeformer produces round duct for the lobby, atrium, corridor and architectural distribution zones. Spiral round duct has the lowest pressure drop and the cleanest visual finish, making it suitable for the architectural lobby and reception areas where the duct is exposed. For the bank HQ ground floor reception and HNW client lobby, spiral round duct is typically specified.
SBKJ SBPC1500 plasma cutter. Specified for the heavier gauge cut-outs — generator room duct, radiator exhaust, plant room transitions, branch take-offs from the main supply duct, fire damper frames, AHU connection collars. The plasma cutter handles 2 to 6 mm gauge stainless and carbon steel for the plant room and back-of-house components.
SBKJ SBLR-600 laser welder. Specified for the premium finish welds where the duct is exposed and the weld is a visible feature. The laser welder produces a clean narrow weld bead suitable for the exposed lobby spiral round duct, the architectural feature duct in atrium spaces, and the premium HNW client space exposed duct routing.
Construction phasing and tenant fitout coordination
The bank HQ, super fund office and investment bank fitout typically follows a base-building-plus-tenant-fitout sequence similar to the broader commercial office tower programme. The base building (shell and core) is delivered first with riser shafts, base building AHUs, smoke management infrastructure and base ductwork to floor entry. The tenant fitout is then installed on a multi-floor basis as the tenancy is signed.
Bank HQ tenant fitout is typically a single-tenant-multi-floor project at one of the major host towers (e.g., NAB at 700 Bourke Street with multiple contiguous floors, Macquarie at 50 Martin Place with the integrated heritage and modern tower, ANZ at 833 Collins Street with the multi-floor headquarters fitout). The fitout sequencing is typically by function — the trading floor first because it is the most demanding HVAC zone, then the corporate offices, then the boardroom and executive amenity, then the cafeteria and end-of-trip facility.
For a typical Big Four bank corporate fitout of 20,000 to 40,000 square metres across 6 to 12 floors, the HVAC ductwork volume is roughly 25,000 to 50,000 metres including the trading floor plenum, the general supply, the return air ductwork, the exhaust and the specialty zones. With an SBKJ SBAL-V auto duct line running 8 to 10 m/min plus an SBKJ SB-ZF1500 stitchwelder for the stainless plenum and acoustic sections, two-shift production delivers the full volume in approximately 6 to 10 weeks.
SBKJ SBFB-1500 spiral tubeformer covers the lobby, atrium and corridor round duct in approximately one-third the time of a comparable rectangular duct volume. SBKJ SBPC1500 plasma cutter handles the heavy-gauge cut-outs in parallel. SBKJ SBLR-600 laser welder handles the premium finish welds for the exposed architectural duct.
The mechanical contractor typically operates an SBAL-V plus SB-ZF1500 plus SBFB-1500 plus SBPC1500 plus SBLR-600 production line cluster in the contractor's own workshop, with spark-resistant manufactured ductwork procured for the AS/NZS 60079 zones. This combined production capability is the standard reference for Australian Tier 1 mechanical contractors working on the bank HQ, investment bank, super fund and fintech sectors.
Commissioning, testing and ongoing operation
Bank HQ, ASX, investment bank, super fund and fintech HVAC commissioning is more extensive than for generic Class A office because of the regulatory documentation requirements and the operational risk profile of the facility.
AS 4254 duct leakage testing. Independent leakage testing during construction by accredited inspector. Class C target for general supply, Class A target for stairwell pressurisation and secure zones. SBKJ TDF flange forming on the SBAL-V achieves Class C with correct gasket and torque; SBKJ SB-ZF1500 welded plenum achieves Class A.
AS 1668.4 smoke management commissioning. Stairwell pressurisation test, atrium smoke exhaust test, fire damper cycle test. Re-test annually for life of the facility per AS 1851.
APRA CPS 234 physical security verification. Duct routing through secure zones documented in the physical security plan and verified by physical penetration testing. APRA-regulated entities maintain the documentation as part of CPS 234 compliance evidence.
NABERS rating audit. Tenant fitout NABERS rating verified by accredited assessor at completion and re-rated annually. The duct leakage class, fan power, filtration grade and demand-controlled ventilation calibration are inputs to the rating calculation.
Trading floor cooling redundancy test. Annual test of the N+1 chiller and AHU changeover. The test simulates failure of the operating unit and verifies that the standby unit picks up the load within the design changeover window (typically 5 minutes or less). The trading floor operates during the test under the standby cooling capacity.
UPS battery room hydrogen detection test. Annual test of the hydrogen detector and the high-rate ventilation trigger logic. The test confirms the detector calibration and the ventilation response time.
Generator room commissioning. Initial commissioning at construction and weekly automatic test cycle with monthly full-load test under operational load.
Major Australian financial sector projects — the reference set
The current generation of major Australian banking, investment bank, super fund and fintech corporate office projects sets the specification benchmark for the next decade.
Macquarie at 50 Martin Place Sydney. The integrated heritage Money Box building and modern rear tower forming the Macquarie corporate headquarters and global trading floor. One of the largest single investment bank trading floors in the Asia-Pacific region. The HVAC specification balances heritage building constraint, modern Premium Grade envelope and trading floor density. Multiple chiller plant redundancy and dedicated stainless plenum for the trading floor acoustic envelope.
Macquarie at One Shelley Street Sydney. The Macquarie Asset Management and Macquarie Capital secondary trading and dealing floor. Premium Grade tenant fitout with extensive trading floor across multiple contiguous floors. NABERS Energy 5.5+ stars.
Commonwealth Bank at South Eveleigh and Darling Park Sydney. The CBA corporate headquarters across the South Eveleigh campus and the Darling Park towers. The largest single bank corporate property holding in Australia. Extensive trading floor, customer contact centre, corporate banking and back-office. NABERS Energy 5.5+ stars across the portfolio.
Westpac at Westpac Place Sydney. The 275 Kent Street headquarters with extensive corporate dealing floor, executive amenity and back-office operations. Premium Grade Class A specification.
NAB at 700 Bourke Street Melbourne. The Cbus Property NAB tower covered in the SBKJ commercial office tower guide. NABERS Energy 5.5 stars at completion. Anchor tenant NAB corporate headquarters with extensive trading floor and end-of-trip facility quality.
ANZ at 833 Collins Street Docklands. The ANZ Centre. 9 floors of contiguous tenant fitout including the trading floor, payments operations, corporate banking and executive functions.
AustralianSuper at 50 Lonsdale Street Melbourne. The largest single super fund corporate office in Australia. Investment, member services, operations and corporate functions across multiple floors. NABERS commitment 5+ stars Energy and 5 stars Indoor Environment.
ASX at 20 Bridge Street Sydney. The ASX headquarters operating the corporate and regulatory functions of the primary Australian stock exchange. Premium Grade Class A specification.
Atlassian Central at Tech Central Sydney. The Atlassian corporate tower under construction. The largest Australian tech corporate office project. Hybrid timber-and-steel structure with extensive engineering, social and amenity space.
WiseTech at Bridge Street Sydney. The WiseTech Global corporate headquarters with engineering team density and 24/7 operation envelope.
Computershare at Yarra Park Melbourne. The Computershare global headquarters for the share registry and corporate trust businesses.
SBKJ machinery for the financial sector fitout
The SBKJ machinery deployed for an Australian bank HQ, investment bank trading floor, ASX facility, super fund office or fintech fitout follows a coordinated production line cluster designed for the simultaneous galvanised, stainless and spark-resistant requirements of the financial sector facility.
SBKJ SBAL-V auto duct production line. The primary galvanised line. Produces rectangular duct with integrated TDF flange in a single pass at 8 to 10 m/min continuous output. Handles 0.6 to 1.5 mm G90 galvanised. The workhorse for the general supply, return and exhaust duct across the bank HQ floor plate, the branch retail floor, the lobby and the corridor. View SBAL-V product page.
SBKJ SBSF-1525 super auto duct line. The higher-throughput galvanised line for combined base building plus multi-floor tenant fitout projects. Specified where the contractor is running concurrent shifts on the bank HQ trading floor, the general office fitout and the branch retail rollout. Production rate is meaningfully above the SBAL-V single shift.
SBKJ SB-ZF1500 stitchwelder. The seamless welded plenum production line. Produces 304 stainless plenum at 0.8 to 1.5 mm thickness with continuous welded seams. Specified for the trading floor acoustic plenum, the bullion vault interior, the cash counting room secure zone, the kitchen grease exhaust, the end-of-trip shower exhaust, the sound attenuator construction and any zone where mechanical joint leakage (both air and sound) must be eliminated. The defining machine for the acoustic NC-30 trading floor and the security-sensitive zones.
SBKJ SBFB-1500 spiral tubeformer. The round duct production line. Produces galvanised and stainless spiral round duct at the lowest pressure drop of any duct geometry. Specified for the lobby, atrium, corridor, branch reception and architectural distribution zones where the duct is exposed and the visual finish matters. Combines with the SBLR-600 laser welder for premium finish exposed joints.
SBKJ SBPC1500 plasma cutter. The heavy gauge cut-out and component production. Handles 2 to 6 mm gauge stainless and carbon steel for the generator room duct, radiator exhaust, plant room transitions, fire damper frames, AHU connection collars and branch take-offs. Sits alongside the SBAL-V and SB-ZF1500 in the contractor workshop as the heavy-gauge complement.
SBKJ SBLR-600 laser welder. The premium finish welding station. Produces clean narrow weld bead suitable for exposed architectural duct, premium HNW client space, lobby spiral round duct joints and any zone where the weld is a visible feature. Specified where the visual finish requires a weld bead beyond the standard stitchweld appearance.
SBKJ spark-resistant manufactured ductwork. Specified for the AS/NZS 60079 Zone 2 envelope around the UPS battery bank and the generator room day tank. Non-sparking interior surfaces, bonded earthing across joints, intrinsically safe interior connections. Transitions to standard galvanised SBAL-V at the boundary of the Zone 2 envelope.
The combined SBAL-V plus SB-ZF1500 plus SBFB-1500 plus SBPC1500 plus SBLR-600 production line cluster, with spark-resistant manufactured ductwork procured for the AS/NZS 60079 zones, covers every Class 5, Class 6, Class 7a and Class 9b zone in the bank HQ fitout, the ASX corporate floor, the investment bank trading floor, the super fund office and the fintech office. See the SBKJ machines overview for full product specifications.
The bottom line — what to specify
For an Australian banking HQ, ASX corporate floor, investment bank trading floor, super fund office or fintech office HVAC ductwork specification, the engineer-led answer is consistent across the sector.
General office floor plate — Class 5, NCC. AS 1668.2 at 10 L/s per person. NABERS Energy 5+ stars target. Galvanised G90 (Z275) through SBKJ SBAL-V at 0.6 to 1.5 mm. AS 4254 Class C leakage. NC-30 to NC-35 acoustic with internally lined supply in low-noise zones. MERV 13+ filtration. Demand-controlled ventilation tied to CO₂ and occupancy sensors.
Investment bank trading floor and bank HQ dealing room — Class 5, NCC, with redundancy overlay. 100 to 300 W/m² internal sensible heat. 22 to 24°C inlet, ±0.5°C tolerance. N+1 redundancy mandatory. Raised access floor cable management and supply path. Hot-aisle/cold-aisle separation in densest dealing rooms. NC-30 acoustic for phone trading. SBKJ SBAL-V galvanised for general supply, SBKJ SB-ZF1500 stitchwelder 304 stainless for acoustic plenum and welded seamless sections.
Bullion vault, cash counting room and RBA cash centre — secure zone overlay. 18 to 22°C, 30 to 50% RH. Clean conditioned supply, secure routing, bullet-resistant chase at vault wall. SBKJ SB-ZF1500 stitchwelder 304 stainless for vault interior. SBKJ SBAL-V galvanised for approach plant room. AS 1530.4 fire resistance to vault FRL. APRA CPS 234 physical security plan documentation.
HNW private banking and client meeting room — discretion and acoustic overlay. NC-25 acoustic envelope. Internally lined supply duct, attenuator at every diffuser, large cross-section duct with velocity below 5 m/s. Discreet routing through secure office ceiling void. Premium thermal comfort. AV control room with clean redundant supply and MERV 13+ filtration.
Branch retail floor — NCC Class 6. AS 1668.2 at 10 L/s per person. ATM enclosure 18 to 26°C climate envelope. NC-35 acoustic at the public banking hall. Queuing zone ventilation peak. SBKJ SBAL-V galvanised with internally lined supply at public-facing zones.
Generator room and UPS battery room — AS/NZS 60079 Zone 2 envelope. Spark-resistant manufactured ductwork for the immediate Zone 2 envelope. AS 1940 day tank diesel storage with bunded exhaust. Hydrogen detection at 25% LEL for lead-acid UPS. AS/NZS 5139 and NFPA 855 for lithium UPS. Combustion air supply and radiator exhaust sized for full-load operation.
Data centre, server room and AV control room — Tier III to Tier IV envelope. N+1 chiller and AHU redundancy. Hot-aisle/cold-aisle containment. SBKJ SB-ZF1500 stitchwelder 304 stainless for plenum and SBKJ SBAL-V galvanised for supply and exhaust. Refer the SBKJ data centre HVAC duct manufacturing guide.
Boardroom, executive and audit committee — NC-25 acoustic. Internally lined supply. Demand-controlled ventilation for variable occupancy. Premium thermal comfort 22°C ±0.5°C, 40-55% RH. Dedicated VAV per room.
Kitchen, cafeteria and worker amenity — NFPA 96 commercial kitchen exhaust. 304 stainless grease duct through SBKJ SB-ZF1500. Make-up air through SBKJ SBAL-V. Dining at AS 1668.2 retail rate. Worker amenity separated from trading floor air.
Print, production, mailroom, secure document storage — dedicated exhaust with filter for laser printer ozone, HEPA-filtered exhaust for mailroom screening, clean filtered supply MERV 13+ for secure document storage at 18-22°C 40-50% RH. AS 4214 gaseous suppression coordination where paper records are critical.
Telecoms room and fibre — clean controlled supply at 20-25°C with MERV 13+ filtration, acoustic separation, positive pressure relative to corridor.
Construction strategy — mechanical contractor operates SBKJ SBAL-V plus SBKJ SB-ZF1500 plus SBKJ SBFB-1500 plus SBKJ SBPC1500 plus SBKJ SBLR-600 production line cluster in the contractor's own workshop, with spark-resistant manufactured ductwork procured for the AS/NZS 60079 zones. Single source for the combined galvanised, stainless, spiral and heavy-gauge production simplifies coordination and shortens the schedule. Combined production capacity for a 20,000 to 40,000 m² bank HQ fitout is approximately 6 to 10 weeks on two shifts.
Commissioning and ongoing — AS 4254 duct leakage tested by independent inspector. AS 1668.4 smoke management commissioning. AS 1851 routine inspection schedule. APRA CPS 234 physical security plan. NABERS rating audit. Trading floor cooling redundancy test annually. UPS battery room hydrogen detection test annually. Generator monthly full-load test. Re-test for life of the facility.
Talk to the SBKJ engineering team
SBKJ Group manufactures the auto duct production lines, stitchwelders, spiral tubeformers, plasma cutters, laser welders and spark-resistant manufactured ductwork specified for Australian banking HQ, ASX, investment bank trading floor, super fund office and fintech fitouts. Our engineering team based in Box Hill North VIC has supported mechanical contractors on financial sector fitouts across Sydney, Melbourne, Brisbane, Perth, Adelaide and Canberra, and we travel to your workshop for installation supervision, operator training and first-article acceptance.
If you are specifying ductwork for a bank HQ, ASX corporate floor, investment bank trading floor, dealing room, bullion vault, cash counting room, branch retail rollout, super fund office, fintech office, generator or UPS battery room, contact us to discuss the SBAL-V, SBSF-1525, SB-ZF1500, SBFB-1500, SBPC1500, SBLR-600 and spark-resistant manufactured ductwork specification for your project. We will return a written engineering response covering machine selection, production rate, lead time and installation plan within 48 hours.
Visit the SBKJ machines overview or the SBAL-V product page for the full equipment range. Read the related guides covering the commercial office tower, the financial trading floor and bank, the in-building data centre, the telecommunications and edge data centre and the integrated resort and gaming sector ductwork specifications. Browse all guides at the SBKJ insights index.
SBKJ Group — Box Hill North VIC, Australia. Email sales@sbkjduct.com. Website sbkjduct.com. WhatsApp and phone +61 435 074 994. Or visit the contact page to send a project enquiry. SBKJ exhibits at ARBS 2026.
