Cosmetics, Skincare and Personal Care Manufacturing HVAC Ductwork — Australian Operator Guide

Why cosmetics manufacturing is the hardest HVAC specification job in Australia

Cosmetic and personal care manufacturing looks superficially simple from outside the plant — a moisturiser is water, oil, a few actives and packaging — but the HVAC engineer who underestimates the duct specification problem typically loses the project on the second commissioning attempt. Three forces compound to make this vertical harder than pharmaceutical bulk manufacture and harder than most food processing.

First, the regulatory map for Australian cosmetics is split across three different bodies depending on the claim on the label. A moisturiser with no functional claim sits under the Australian Consumer Law and is administered by the Australian Competition and Consumer Commission, which publishes the Cosmetics Information Standard 2020 setting out mandatory ingredient labelling and consumer information requirements. The same brand's sunscreen — even if it is otherwise identical chemistry — crosses into the Therapeutic Goods Act 1989 and falls under the Therapeutic Goods Administration, with sunscreens specifically regulated by Therapeutic Goods Order 105 (TGO 105) which mandates standardised SPF testing and labelling. Anti-dandruff shampoo, antiperspirant, anti-acne, anti-fungal nail lacquer and any number of borderline products are similarly TGA-regulated. The Skin Cancer Audit Reform Act tightened SPF enforcement further. The same plant therefore has to satisfy both ACCC labelling rules and TGA Good Manufacturing Practice on alternate batches.

Second, the product chemistry is unusually varied within a single facility. A typical Australian contract manufacturer or own-brand plant runs aqueous emulsions, anhydrous balms, alcohol-based tonics, mineral-powder foundations, soap saponification, shampoo with surfactants, fragrance with high concentrations of volatile organic compounds, and aerosol or pump pressurised packaging — all under one roof. The HVAC duct in a fragrance compounding room sees ethanol vapour above 1,500 ppm; the duct in a soap kettle area sees 70% relative humidity and saponification steam; the duct in a powder press room sees ultrafine talc and pigment dust at concentrations that demand dust collection and explosion venting. Specifying one duct grade for the whole plant is the most common engineering mistake we see.

Third, the cleanliness expectations from premium-brand customers and from contract-manufacturing audits have ratcheted up over the last decade. Brands like Aesop, Jurlique, The Beauty Chef and Frank Body run brand audits that read like miniature pharmaceutical inspections — viable air sampling, non-viable particle counting, swab tests on duct interior accessible surfaces and a full documented commissioning trail. Even pure cosmetic lines outside TGA scope now routinely build to ISO 22716 cosmetics GMP because retailer audits demand it. ISO 22716 does not give the HVAC engineer numbers the way Annex 1 of the PIC/S guide does for sterile pharma, but it does require that duct surfaces can be cleaned, inspected and confirmed contamination-free. Galvanised duct cannot meet that bar inside a GMP envelope.

This guide gives the working specification — material, seam, filter, pressure cascade — for each room type in a typical Australian cosmetics plant. It maps the major Australian operators, names the regulatory hooks the plant needs to clear, and ends with the SBKJ machine and duct configuration we deliver for cosmetic GMP customers from our Box Hill North VIC office.

The Australian regulatory stack — what applies to your plant

Before any duct line is specified the plant has to be mapped against the regulatory layers. The five layers below cover essentially every Australian cosmetic and personal care manufacturer.

1. ACCC Cosmetics Information Standard 2020

The Cosmetics Information Standard 2020 is the floor for every cosmetic product sold in Australia. It is enforced by the Australian Competition and Consumer Commission under section 134 of the Australian Consumer Law. The standard requires ingredient lists in INCI nomenclature, country of origin information and specific consumer information on the label. It does not directly prescribe manufacturing facility specifications, but it does establish that any cosmetic with misleading or false labelling is a consumer-law breach — and traceability back through the plant to the batch record is what allows a manufacturer to defend the label. Plants that cannot produce a clean batch record back to ingredient lot, environmental conditions and operator are exposed.

For HVAC engineering purposes the standard's relevance is indirect: any duct construction that contaminates batches (galvanised flaking, particulate from unsealed seams) creates traceability failures that the ACCC can use as evidence of inadequate quality control. The remedy is documented duct fabrication with as-built records — exactly what SBKJ supplies with 316L sealed-seam packages.

2. Therapeutic Goods Act 1989 and the TGA

The Therapeutic Goods Act 1989 captures any product that makes a therapeutic claim. The four most common cosmetic categories that fall under TGA jurisdiction in Australia are:

• Sunscreens — any primary sunscreen with an SPF claim. Regulated under TGO 105 with prescribed UV testing methodology and labelling.
• Anti-dandruff and medicated shampoos — zinc pyrithione, ketoconazole, salicylic acid or coal tar formulations.
• Antiperspirants — aluminium chlorohydrate or aluminium zirconium tetrachlorohydrex glycine.
• Anti-acne and anti-fungal cosmetics — benzoyl peroxide, salicylic acid, topical anti-fungals.

The Skin Cancer Audit Reform Act tightened SPF claim enforcement after a string of independent test results in 2024 showed several Australian sunscreens performed below their claimed SPF rating. The downstream effect on plant engineering has been higher audit frequency, more aggressive environmental monitoring during SPF batch manufacture, and a clear preference among large sunscreen brands for 316L stainless duct over coated mild steel.

A TGA-licensed manufacturer operating under either the PIC/S Guide to Good Manufacturing Practice or ISO 22716 must demonstrate that the facility design — including HVAC and ductwork — does not contaminate the product. The ductwork specification is reviewed during pre-licence inspection and re-reviewed at every renewal audit.

3. ISO 22716 — Cosmetics Good Manufacturing Practices

ISO 22716 is the international standard for cosmetics GMP and is the most common framework adopted by Australian operators who do not require full pharmaceutical PIC/S certification. The standard covers personnel, premises, equipment, raw materials and packaging, production, finished products, quality control, waste and subcontracting. Section 5 (premises) is the HVAC engineer's working text.

ISO 22716 paragraph 5.3 requires that premises are designed to protect the product from contamination and to permit effective cleaning and maintenance. The standard is deliberately not as prescriptive as pharmaceutical GMP — there are no Annex 1 grade-A/B/C/D classifications — but it does require that the manufacturer establish appropriate environmental controls based on a hazard analysis. In practice every credible ISO 22716 implementation in Australia includes:

• Defined air quality classes per room, normally aligned with ISO 14644-1.
• Documented air change rates per room.
• Differential pressure measurement between rooms.
• Temperature and humidity limits per process.
• Duct construction that supports cleanability and inspectability.

4. ISO 14644-1 cleanroom classification

ISO 14644-1 classifies cleanrooms by particle count at defined particle sizes. The two classes that dominate cosmetics manufacturing are ISO Class 8 (the room background for most non-sterile filling and bulk compounding) and ISO Class 7 (used for premium skincare filling rooms, TGA-listed sunscreen lines and laminar flow over open product). ISO Class 6 occasionally appears at the actual filling head when a brand specifies localised laminar flow over an open jar.

ISO 14644-1 sets the ceiling for non-viable particles per cubic metre at the four sample particle sizes (0.5 µm, 1 µm, 5 µm and larger). The HVAC engineer translates the class into air change rate, filter grade and pressurisation, but the standard itself is silent on those parameters — they come from industry practice and from the SMACNA cleanroom guidance.

5. AS/NZS hazardous-area and combustible-dust standards

Wherever the cosmetic plant uses alcohol, ethanol, isopropanol, perfume oils above 60% volatile organics, or processes combustible powders (talc, kaolin, mica, ultramarines, iron oxides), the Australian and New Zealand hazardous-area standards apply:

• AS/NZS 60079.10.1 — classification of areas for explosive gas atmospheres.
• AS/NZS 60079.10.2 — classification of areas for combustible dust atmospheres.
• AS/NZS 60079.14 — electrical installations in explosive atmospheres.

These standards drive the duct from a material-only specification into a full hazardous-area specification: bonded conductive duct, antistatic flexible connectors, ATEX or IECEx rated exhaust fans, deflagration vents on dust collection ducting, and isolated electrical zones.

6. AS 4574 / AS 4674 food-grade hygiene cross-reference

AS 4574 (food premises construction) and AS 4674 (design, construction and fit-out of food premises) are not directly applicable to most cosmetics manufacturing, but where the plant also produces lip products with food-grade flavours, oral hygiene, edible cosmetic items or ingestible supplements (a common adjacency for brands like The Beauty Chef and some Trilogy lines), the food-grade standard becomes the more conservative reference and typically governs the duct specification by default. The two standards have overlapping requirements on cleanability, accessible surfaces and material grade that translate cleanly into 316L stainless duct.

Room-by-room HVAC duct specification

The plant breaks into seven canonical room types. Each has a distinct hazard profile and a distinct duct specification.

Room 1 — Bulk compounding and emulsification

The compounding room is the formulation heart of the plant — water-phase and oil-phase tanks, homogeniser, vacuum emulsifier and the transfer pumps that move bulk into holding vessels. Process risks for the HVAC engineer:

• Steam and condensation from heated water phase (typically 70 to 85°C).
• Aerosolised oils and emulsifier droplets from high-shear mixing.
• Preservative vapour (phenoxyethanol, benzyl alcohol, sodium benzoate volatiles).
• Occasional alcohol or solvent additions during specific formulations.

Specification: ISO 14644 Class 8 background, 15 to 20 air changes per hour, MERV 14 supply filtration, HEPA H13 terminal not required, positive pressure 10 to 15 Pa against unclassified corridor. Duct material 316L stainless on supply downstream of final filter, return air can be 304 stainless. Seam type SMACNA Class A sealed-seam on supply, Pittsburgh lock seam acceptable on return. Insulation external — never internal lining — to eliminate any porous interior surface that traps droplets.

Where the compounding room serves both aqueous emulsions and alcohol-based tonics on a campaign basis, the duct should be specified to the more onerous case (alcohol) and the room must be assessed for AS/NZS 60079.10.1 hazardous-area classification during alcohol campaigns. In practice this means electrically bonded duct, antistatic flexible connectors and either a hazardous-area fan or sufficient dilution ventilation to keep the environment below 25% of the lower explosive limit.

Room 2 — Filling line and primary packaging

The filling room sees open product flowing through the filling heads into bottles, jars, tubes or sachets. It is the highest-risk room in the plant for product contamination because the product is exposed and the operator-product proximity is closest.

Specification: ISO 14644 Class 8 room background with ISO Class 7 laminar flow over the filling head, 20 to 30 air changes per hour at the filling line, HEPA H13 minimum at the terminal, HEPA H14 standard for TGA-listed and premium skincare lines. Positive pressure 15 to 20 Pa against the airlock, airlock 10 to 15 Pa positive against the corridor.

Duct material 316L stainless on all supply downstream of the final HEPA bank, fully sealed transverse and longitudinal seams (SMACNA Class A maximum leakage 0.84 L/s per m² at 500 Pa), no internal acoustic lining, no internal duct accessories that cannot be wiped clean. Drains where the room is wash-down cleaned must be sloped 1:50 minimum and connected to a deep-seal trap. Diffusers selected for unidirectional flow over the filling head, typically swirl diffuser at the room background and laminar flow hood directly over the filling spout.

Room 3 — Fragrance compounding

Fragrance compounding is where the perfumer or compounder weighs and blends essential oils, fragrance oils, alcohols and fixatives. The room sees the highest single concentration of volatile organic compounds in the plant — limonene, linalool, ethanol, isopropanol, diethyl phthalate as a carrier and a hundred other essence-grade volatiles.

Specification: dedicated supply and dedicated exhaust, both fully isolated from the rest of the plant. Negative pressure 10 to 15 Pa against the corridor. Air change rate 30 to 50 per hour to maintain VOC levels below the lower explosive limit by a comfortable margin. Supply duct 316L stainless or 304 stainless minimum, exhaust duct 316L stainless mandatory with full sealed TIG seam welds. Exhaust fan ATEX or IECEx rated for Zone 2 or Zone 1 depending on the LEL margin design. Antistatic flexible connectors. Electrical bonding strap continuous from each duct section through to building earth.

The exhaust discharge point should be at roof level, away from any air intake by at least 10 metres and downwind of any occupied space under prevailing wind conditions. Activated carbon scrubbing is optional but increasingly mandatory under state EPA conditions for plants in residential-adjacent zones.

Room 4 — Mineral cosmetic and powder room

The powder room is where dry pigments, talc, mica, iron oxides, kaolin, ultramarines and ultrafine particulate are weighed, blended and pressed into compacts. The hazard is dust — both as occupational hygiene risk and as combustible-dust ignition risk.

Specification: dedicated dust collection at every dust generation point, captured at the source via fume cupboards, downdraft tables or hooded enclosures. Filter strategy MERV 13 minimum on the room supply, room exhaust filtered through a primary cyclone and a secondary cartridge filter rated to HEPA H13 or H14 depending on the specific pigments handled. The dust collection duct itself is conductive 304 or 316L stainless, fully grounded, fitted with deflagration vents per AS/NZS 60079.10.2 sized for the room and powder loading.

Negative pressure 10 to 20 Pa against the corridor to prevent migration of fine pigment into the rest of the plant. Operators wear powered air-purifying respirators for the most aggressive pigments (cobalt blue, chromium oxide green) and the room is decontaminated between colour campaigns with full duct accessibility inspection.

Room 5 — Soap and shampoo (saponification and surfactant)

Soap saponification involves caustic (sodium hydroxide for hard soap, potassium hydroxide for soft soap) reacting with oils and fats at 70 to 95°C. Shampoo manufacture involves surfactant blending (sodium laureth sulfate, cocamidopropyl betaine) and acid neutralisation. Both processes generate humidity and trace alkaline aerosol.

Specification: 304 or 316L stainless duct mandatory — galvanised duct corrodes within months in this environment. Air change rate 20 to 25 per hour, humidity maintained below 65% RH by the AHU or by dehumidification, room ventilation includes condensation drainage from the duct low points. Ammonia and amine raw materials require localised exhaust at the metering point.

Where the soap line includes high-pressure spray drying for powdered detergent or where the shampoo line includes alcohol-based clarifying tonics, the AS/NZS 60079.10.1 hazardous area assessment applies and the duct moves to electrically bonded fully sealed construction.

Room 6 — Premium skincare formulation and active compounding

Premium skincare (Aesop, Jurlique, The Beauty Chef, Trilogy) typically blends botanical extracts, retinol, peptides, vitamin C derivatives and a long list of actives at micro-concentrations. The room is closer to a pharmaceutical compounding suite than a commodity cosmetic room.

Specification: ISO 14644 Class 7 background, 25 to 30 air changes per hour, HEPA H13 terminal supply, 316L stainless sealed-seam duct throughout, dedicated change room with operator gowning sequence (cleanroom suit, hairnet, gloves, dedicated footwear). Pressurisation 15 Pa positive against the airlock. Temperature and humidity control tight — typically 20 ± 2°C and 50 ± 5% RH — to protect heat-sensitive and humidity-sensitive actives.

Room 7 — Warehouse, raw material staging and finished goods

The warehouse is the easiest room to specify but the most commonly under-specified. Raw material staging and finished goods storage do not require cleanroom classification but they do require:

• Temperature control within the storage range specified on the raw material certificate of analysis (often 15 to 25°C for botanical extracts and actives).
• Humidity below 60% RH for hygroscopic powders and packaging.
• Positive pressure or at least neutral pressure against external doors to keep dust and insects out.

Duct material can be galvanised in the warehouse provided it is outside the GMP envelope (separated by an airlock from any classified room). Where the warehouse opens directly into the production area, the same 304 stainless minimum applies.

Why galvanised duct fails in cosmetics plants — three corrosion mechanisms

Galvanised steel duct is the default specification for commercial HVAC because zinc galvanising gives mild steel adequate corrosion resistance in dry indoor air at moderate cost. Inside a cosmetics plant three corrosion mechanisms attack the zinc faster than most engineers expect.

Mechanism 1 — humidity corrosion. Above approximately 60% relative humidity, zinc begins to form a white corrosion product (zinc hydroxide and zinc carbonate) on the duct interior. In a soap or shampoo room running at 70 to 80% RH from saponification steam, this white-rust formation begins within weeks of commissioning and accelerates over the first year. The flaking white product drops into open product on the line below and creates particulate contamination that is visible in viable air sampling and in finished-product sediment tests.

Mechanism 2 — solvent and alcohol attack. Ethanol, isopropanol and other low-molecular-weight alcohols dissolve zinc slowly but continuously. Fragrance compounding rooms running ethanol-based formulations at concentrations above 1,000 ppm in air will measurably erode zinc coatings within 12 to 18 months. The thinning coating exposes the underlying mild steel which then corrodes more rapidly. The corrosion is patchy and unpredictable — sometimes the duct looks fine externally but the interior is severely degraded at a low point or at a flange seam.

Mechanism 3 — alkali and amine attack. Ammonia, ethanolamines, triethanolamine and the alkaline conditioners used in hair-care formulations attack zinc directly. The corrosion product is zinc ammonate or zinc amine complexes, which are typically more soluble than the parent zinc hydroxide and can be carried in airborne droplets through the duct. Plants making both shampoo and skincare on alternating campaigns are particularly exposed.

All three mechanisms also undermine the duct seam — Pittsburgh locks and S-cleats that depend on tight metal-to-metal contact for sealing start to leak as the metal corrodes. The cumulative effect is that a galvanised duct line in a cosmetic GMP plant will typically need replacement within 5 to 8 years where a stainless steel line will exceed 25 years.

A fourth, less commonly discussed mechanism is galvanic attack at the joint between galvanised duct and stainless steel components (HEPA filter frames, sanitary clamps, sample ports). The zinc anodises preferentially to the stainless cathode and corrodes accelerated at the interface. Plants that mix galvanised duct with stainless filter housings see white-rust runs at every flange-to-filter joint within the first 18 months. The only reliable remedy is to keep the entire interconnected duct run in stainless and to use stainless flanges, sample ports and HEPA housings. Mixed-metal duct systems in cosmetic GMP plants are a documented audit finding under both ISO 22716 internal audits and TGA pre-licence inspections, and they remain one of the most common reasons that an otherwise well-designed plant fails its first audit cycle.

The economic argument for stainless is therefore not only the longer service life but the avoided cost of audit-driven replacement, batch loss during the remediation, and the reputational cost of a publicly recorded GMP non-conformance. An Australian cosmetic plant that has to publicly announce a TGA conditional listing because of facility design issues will typically lose more in the next-quarter revenue than the entire incremental cost of specifying 316L stainless from day one.

Why 316L stainless is the working specification

Both 304 and 316L stainless steel are acceptable for general cosmetics duct, but 316L has become the working specification for production zones in plants pursuing TGA licensure or premium-brand audit pass. The case for 316L:

• Molybdenum content (2 to 3% Mo) in 316L gives substantially better resistance to chloride pitting than 304. Chlorides appear in cosmetics plants from saline raw materials, from cleaning solutions and from coastal-air infiltration in plants located near the Australian coast.
• Low carbon (L grade, <0.03% C) reduces carbide precipitation during welding and avoids sensitisation in the heat-affected zone, which is critical for fully welded duct seams.
• Smooth, electropolishable interior surface resists biofilm formation in humid environments and supports clean-in-place if the plant ever upgrades to CIP cleaning of duct interiors.
• Compatible with passivation — after fabrication the duct is pickled and passivated with citric or nitric acid to restore the chromium oxide surface layer disturbed during welding, locking in the corrosion resistance.
• Mature supply chain in Australia — 316L coil is readily available from certified Australian and import mills with full mill certificates and PMI (positive material identification) test capability.

The cost differential between galvanised and 316L on a typical cosmetics plant duct package is 3.5 to 4.5 times on raw coil and 2.5 to 3.5 times on installed cost. The cost differential between 304 and 316L is approximately 20 to 30%. For the production rooms (compounding, filling, fragrance, premium skincare) the 20% upgrade from 304 to 316L is almost always justified by the longer life and the audit pass margin.

Sealed-seam SMACNA Class A — what it means in practice

The Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) classifies duct construction by leakage class. The four standard classes are:

• Class A — maximum leakage 0.84 L/s per m² at 500 Pa. All transverse and longitudinal seams sealed.
• Class B — maximum leakage 2.8 L/s per m² at 500 Pa. All transverse joints sealed; longitudinal seams unsealed.
• Class C — maximum leakage 12 L/s per m² at 500 Pa. Transverse joints only sealed where called out.
• Unsealed — Class C plus. Suitable only for return air outside classified zones.

For cosmetic GMP plants the working specification is Class A on all supply duct downstream of the final HEPA bank in classified zones, Class A or Class B on supply upstream of the final filter, and Class B on return air. The fragrance exhaust duct is typically fully welded TIG seam — a class beyond SMACNA Class A, normally referred to in the contract as “leak-tight welded” with no allowable leakage at the specified test pressure.

Achieving Class A reliably on a 316L stainless duct fabrication requires three things: tight dimensional tolerance on the duct profile (so the seam mates without forcing), a properly seated Pittsburgh or button lock seam, and a compatible sealant cured to the manufacturer's specification before pressure testing. SBKJ duct lines profile 316L coil to dimensional tolerances suitable for Class A construction and our standard quality plan includes leakage test of every fabricated section before despatch.

HEPA filtration — H13, H14 and the EN 1822 classification

HEPA filtration in cosmetic GMP plants is graded under EN 1822 (or the equivalent ISO 29463). The three relevant grades are:

• H13 — 99.95% integral efficiency at MPPS (most penetrating particle size, approximately 0.3 µm).
• H14 — 99.995% integral efficiency at MPPS.
• U15 — 99.9995% integral efficiency at MPPS, ULPA grade.

H13 is the default for ISO Class 7 and Class 8 rooms in cosmetic GMP. H14 is specified for premium skincare and TGA-listed sunscreen lines where the brand requires margin on particle count. U15 is unusual outside sterile pharmaceutical applications.

HEPA filters require duct construction that supports filter integrity testing — typically a downstream sampling port and an upstream challenge port for DOP or PAO aerosol injection. The duct fabrication has to provide these ports without compromising the Class A leakage rating. SBKJ supplies sealed sampling-port assemblies as part of the cosmetics-GMP duct package.

Pressurisation cascade — the architecture that makes the plant work

Pressurisation cascade is the difference between a plant that holds its cleanliness class and a plant that loses it every time someone opens a door. The principles:

• Classified rooms positive against the airlock. Filling room +15 to +20 Pa against the airlock.
• Airlock positive against the corridor. +10 to +15 Pa.
• Corridor positive against unclassified. +5 to +10 Pa against warehouse.
• Hazardous and solvent rooms negative. Fragrance compounding -10 to -15 Pa against the corridor with dedicated exhaust through the roof.
• Powder rooms negative. Mineral cosmetic room -10 to -20 Pa to prevent pigment migration.

The cascade is achieved by air balance — supplying more air to the high-pressure rooms than is exhausted, and exhausting more air from the low-pressure rooms than is supplied. The duct system has to accommodate the imbalance with adequately sized supply duct, return duct and exhaust duct on each room. The HVAC engineer's most common error in cosmetic plants is sizing the return duct on the same area as the supply duct, which assumes balanced flow and breaks the pressurisation cascade.

Australian cosmetic and personal care operators — the market map

The Australian cosmetic and personal care market is unusual globally for the strength of home-grown premium brands relative to the multinationals. Understanding the operator landscape helps the HVAC engineer benchmark the right specification for the plant.

Home-grown premium and mass brands

• Sukin — Melbourne-founded private label and own-brand natural skincare, formerly within the BWX group before BWX’s exit. Strong contract-manufacturing footprint and a benchmark for the lower-mass-premium tier.
• Aesop — Melbourne-founded premium skincare and hair care, now within the L’Oréal group after the 2023 acquisition from Natura &Co. Aesop’s Melbourne headquarters drives high-spec premium-brand audit standards across its supplier base.
• Jurlique — Adelaide Hills founded, R&D at Mt Barker, biodynamic-farm-to-bottle premium skincare. Now owned by Pörsch Beratungs GmbH. Operates one of the most documented manufacturing trails in Australian cosmetics.
• Lush Australia — Sydney-based subsidiary of the UK Lush group, B Corp certified, fresh handmade approach to cosmetics. Plant runs at high air change rates because the fragrance loading per square metre of production floor is among the highest in any cosmetic operation.
• Trilogy — New Zealand origin, sold widely in Australia. Premium rosehip-oil-based skincare.
• The Beauty Chef — Sydney-based premium ingestible-beauty brand, blending cosmetic, supplement and food-adjacent regulatory categories.
• Frank Body — Melbourne-based coffee-scrub and body-care brand with strong social-commerce distribution.
• Naked Sundays — Australian sunscreen brand, TGA-licensed under TGO 105.
• Ultra Violette — Australian sunscreen brand, TGA-licensed.
• Natio — Australian skincare brand currently owned by Symbion.
• Innoxa — TGA-licensed Australian cosmetics manufacturer.

Multinational manufacturers operating in Australia

• L’Oréal Australia — distribution centre at Westmead Sydney, serving Australia and New Zealand.
• Procter & Gamble Australia — manufacturing site at Bayswater VIC.
• Unilever Australia — manufacturing footprint including Lithgow NSW and Minto NSW.
• Johnson & Johnson Australia — consumer health and personal care distribution and manufacturing.
• Estée Lauder Australia — distribution and high-end retail support.

Major contract manufacturers (CDMOs) and private-label specialists

• The Australian Beauty Co — full-service cosmetic contract manufacturer.
• Adina Cosmetics — Sydney-based private-label and own-brand contract manufacturer.
• Hassell-Free — Western Australian contract manufacturer.
• Endeavour Foods — formerly within the BWX group; food-adjacent personal care manufacturing.

Retail and own-brand channels

• Mecca Brands — Australia’s leading prestige cosmetics retailer, increasingly developing own-brand lines that require GMP-licensed contract manufacturing.
• Adore Beauty — Australian online cosmetics retailer with its own private-label expansion.
• Wet Brush Australia — personal care accessory distribution with cosmetic-adjacent product manufacturing.

Across this map the technical specification gradient runs from cosmetic-only (ACCC Information Standard 2020 floor) through ISO 22716 cosmetic GMP (the working level for premium brands and CDMOs) up to TGA PIC/S licence for sunscreen and therapeutic-claim manufacturers. The HVAC duct specification follows the same gradient — 304 stainless and Class B sealed seams at the lower end, 316L sealed-seam SMACNA Class A and dedicated exhaust at the upper end.

One pattern worth noting for HVAC engineers entering this vertical: the Australian operator landscape is unusually consolidated around contract manufacturing. Many of the premium brands listed above do not own a manufacturing plant — they specify formulations and outsource production to one of the three or four major CDMOs and to a long tail of smaller private-label fillers. This means the duct specification for any given CDMO has to satisfy the strictest brand on its customer list, not the average. The Australian Beauty Co for example may fill SKUs for an entry mass-market line on Monday and a TGA-listed sunscreen brand on Wednesday — the duct in the filling room has to clear both audits. The practical effect is that even mid-tier CDMOs increasingly build to the upper-tier specification (316L stainless, sealed-seam SMACNA Class A) because the cost of running two parallel filling lines for two specification tiers exceeds the cost of building the whole plant to the higher tier.

The same dynamic explains why the Bayswater and Lithgow multinational plants run consistently high HVAC specification despite producing primarily commodity SKUs — their group QA standards inherit from European parent-company GMP frameworks and from the audit-readiness expectations of group internal audit, regardless of the local regulatory floor.

SBKJ machine and duct configuration for cosmetic GMP customers

SBKJ ships duct lines for cosmetic GMP customers in three standard configurations depending on which end of the market the plant serves.

Configuration A — entry cosmetic GMP (304 stainless, Class B)

For pure cosmetic operators outside TGA scope and outside high-fragrance or high-solvent processing, the entry configuration is:

• SBKJ SBAL-V auto duct production line configured for 304 stainless coil 0.6 to 1.2 mm.
• Plasma cutter with stainless-compatible torch.
• TDF flange former (304 stainless flange profile).
• SMACNA Class B seam configuration with sealant injection at transverse joints.
• Standard Pittsburgh lock longitudinal seam.
• External insulation only, with vapour barrier.
• Leakage testing at 500 Pa per SMACNA HVAC Air Duct Leakage Test Manual.
• Full as-built fabrication documentation including coil mill certificates and dimensional inspection records.

Configuration B — premium cosmetic and TGA-listed (316L stainless, Class A)

For premium skincare brands, TGA-listed sunscreens and operators pursuing PIC/S certification:

• SBKJ SBAL-V auto duct production line configured for 316L stainless coil 0.8 to 1.5 mm.
• Dedicated stainless-only tooling on the line (no zinc cross-contamination).
• TIG seam welder for longitudinal seam on critical runs (filling-room supply downstream of HEPA, fragrance exhaust).
• Argon backing on all longitudinal seam welds for full root penetration.
• Internal weld pickling and passivation per AS 1554.6 stainless steel welding.
• SMACNA Class A construction with sealed Pittsburgh and sealed transverse flanges.
• Continuous bonding strap on hazardous-area runs.
• Full as-built documentation: coil heat numbers, weld procedure specifications, welder qualifications, leakage test reports, pressure decay reports.

Configuration C — fully welded fragrance exhaust and powder dust collection

For the most onerous applications — fragrance exhaust, mineral cosmetic dust collection, alcohol vapour exhaust:

• SBKJ SBAL-V auto duct line plus dedicated TIG welding station.
• 316L stainless coil 1.2 to 2.0 mm depending on duct diameter and pressure rating.
• Fully welded longitudinal seam, fully welded transverse flanges where weld access allows.
• Deflagration vent integration per AS/NZS 60079.10.2 on combustible-dust ducting.
• Electrically bonded with continuous earth strap to building earth grid.
• Hazardous-area certified flexible connectors at fan inlets and outlets.
• Leak-tight pressure test at 1.5 times design pressure with zero allowable leakage at the test pressure.

Commissioning sign-off — what the HVAC engineer signs to close the project

A cosmetic GMP plant cannot make first batch until the HVAC system is commissioned and the documentation pack is signed off. The minimum sign-off pack for an Australian cosmetic GMP plant:

• Air change rate report — per room, measured by traverse, against design specification.
• Differential pressure log — at least 24 hours of continuous pressure logging at each pressurisation boundary.
• HEPA integrity test report — DOP or PAO challenge of every terminal HEPA filter, scan rate per EN 1822, leak threshold per filter grade.
• Particle count report — non-viable particle count per ISO 14644-1 at the specified particle sizes, at-rest and in-operation as applicable.
• Viable air sampling report — active air sampling and settle plate exposure per the plant's environmental monitoring procedure.
• Temperature and humidity log — per zone, at least one week of continuous logging spanning the production schedule.
• Duct leakage test report — per SMACNA leakage class, signed by the duct contractor.
• Material conformance pack — coil mill certificates, weld procedure specifications, welder qualification certificates, passivation procedure records.
• As-built drawings — including all as-built dimensions, equipment locations, sample port locations and access panel locations.

SBKJ supplies the duct-side documentation pack with every cosmetic GMP delivery so the plant's commissioning engineer has everything they need to close out the HVAC portion of the validation report.

Common engineering mistakes we see in Australian cosmetic plants

Across the last decade of SBKJ deliveries to cosmetic and personal care customers in Australia, the same handful of specification errors recur. Avoid these.

Mistake 1 — internal duct lining

Internal acoustic lining (typically fibrous glass or open-cell foam) is common in commercial HVAC for noise control. In a cosmetic plant the porous interior surface traps droplets, supports microbial growth and becomes impossible to clean. The remedy is external insulation only, with smooth interior duct surface. Where noise attenuation is needed, use external acoustic enclosure on the AHU and sound traps with sealed cleanable interior.

Mistake 2 — galvanised return air

Some plants specify stainless on the supply side but leave galvanised on the return. Where the return duct routes back through the AHU and re-circulates to the supply, any zinc corrosion product carried in the return air ends up redeposited in the supply duct. The remedy is matching material grade on supply and return wherever they share air, with 100% fresh-air systems being the only exception that can tolerate mixed materials.

Mistake 3 — under-sized exhaust on fragrance and solvent rooms

Engineers sometimes size fragrance and solvent exhaust on occupancy ventilation rates (the same number used for offices) when the room actually needs LEL-margin ventilation rates 5 to 10 times higher. The remedy is to calculate exhaust on the worst-case solvent inventory and worst-case VOC release rate, with margin to keep the room below 25% LEL under fault conditions.

Mistake 4 — no commissioning baseline

Plants that skip the at-rest commissioning baseline have nothing to compare to during routine environmental monitoring. The remedy is to commission with a full at-rest and in-operation particle count baseline and to file the baseline as a controlled record for the life of the plant.

Mistake 5 — pressurisation cascade ignored at airlock doors

The pressurisation cascade only works if the airlock doors are not opened simultaneously. Plants with interlocked airlock doors hold the cascade; plants with non-interlocked doors typically lose it within months of operator habit drift. The remedy is mechanical interlock or magnetic interlock with door-position monitoring on every airlock.

Mistake 6 — unsealed transverse seams on supply downstream of HEPA

HEPA filtration is wasted if the duct downstream leaks. A 0.1% leakage rate downstream of a 99.95% HEPA filter pulls the room cleanliness back to roughly the supply-air upstream condition. The remedy is SMACNA Class A construction on every metre of supply duct downstream of the final HEPA bank and a documented leakage test before the room is energised.

Mistake 7 — no dust collection on the powder room

The powder room is the highest combustible-dust risk in the plant. Some plants exhaust the powder room directly through a fabric filter without primary cyclone separation and without deflagration venting, on the basis that the powder loading is low. The remedy is dedicated dust collection at every dust generation point, primary cyclone separation, secondary cartridge filtration to HEPA, deflagration venting sized per AS/NZS 60079.10.2 and electrical bonding throughout.

Working with SBKJ — the engagement model for cosmetic GMP customers

SBKJ engages cosmetic GMP customers in four phases, designed to match Australian construction-management timelines:

1. Specification consultation (week 0 to 2). SBKJ senior engineer reviews the plant layout, regulatory mapping (ACCC, TGA, ISO 22716) and the room-by-room specification matrix. Output is a duct specification per zone with material grade, seam class and filter grade aligned to the audit standard.
2. Fabrication planning (week 2 to 6). Coil specification, mill source, weld procedure, quality plan and inspection plan agreed and locked. Coil ordered against mill certificate and PMI test trace.
3. Fabrication and quality (week 6 to 14). Duct fabricated on the SBKJ SBAL-V line, longitudinal seams welded TIG where specified, pickling and passivation per spec, dimensional inspection and leakage test per section before despatch.
4. Site support (week 14 to 20). SBKJ engineer on site for installation supervision, leakage retest after installation, support to the plant's commissioning engineer during HEPA integrity testing and particle count baseline.

For ARBS 2026 and other Australian trade show contacts, SBKJ runs full hands-on demonstrations of the SBAL-V stainless configuration and the TIG seam welder at Box Hill North VIC. Plant managers from Australian Beauty Co, Adina Cosmetics, Hassell-Free, the BWX-legacy plants and the multinational Bayswater and Lithgow sites have visited.

Cost model — what an Australian cosmetic GMP duct package typically costs

Indicative cost ranges for an Australian cosmetic GMP plant, based on SBKJ project history (in AUD per square metre of duct surface area, installed, exclusive of insulation):

• Galvanised duct, Class B — AUD 180 to 240 per m² installed. Suitable only for office HVAC and warehouse outside the GMP envelope.
• 304 stainless duct, Class B sealed seam — AUD 480 to 620 per m² installed. Suitable for entry cosmetic GMP, return air in classified zones, support areas.
• 316L stainless duct, Class A sealed seam — AUD 620 to 820 per m² installed. The working specification for cosmetic GMP supply downstream of final filter.
• 316L stainless duct, fully TIG welded — AUD 950 to 1,300 per m² installed. Fragrance exhaust, alcohol vapour exhaust, hazardous-area runs.
• Dust collection ductwork — AUD 1,100 to 1,600 per m² installed with deflagration venting, conductive bonding and cartridge filter cabinet.

The total HVAC duct package on a mid-sized Australian cosmetic GMP plant (1,000 to 2,500 m² production floor) typically runs between AUD 450,000 and AUD 1.4 million depending on the configuration mix. Premium skincare and TGA-licensed sunscreen plants are at the upper end of the range; commodity cosmetic and entry GMP plants at the lower.

Frequently asked questions

Does ISO 22716 require 316L stainless duct?

No. ISO 22716 does not prescribe duct material. It requires that premises are designed to protect the product from contamination and to permit effective cleaning and maintenance. In practice for Australian cosmetic plants this translates to stainless steel (304 minimum, 316L preferred) sealed-seam construction in production zones, because galvanised duct cannot reliably meet the cleanability and inspectability requirements. Auditors expect to see a material justification in the plant's design qualification documentation.

Can I use 304 stainless instead of 316L to reduce cost?

Yes, 304 stainless is acceptable for most cosmetic GMP applications and saves approximately 20% on raw material cost. The case for 316L over 304 is strongest in three situations: (1) production rooms exposed to chlorides from saline raw materials or coastal-air infiltration, (2) production rooms running alcohol or solvent campaigns, and (3) TGA-licensed plants where the audit pass margin justifies the premium. For pure cosmetic plants outside TGA scope handling water-based formulations only, 304 is a defensible specification.

What air change rate does a cosmetic filling room need?

Industry practice for ISO Class 7 background with Class 6 laminar flow over the filling head is 20 to 30 air changes per hour at the room background and locally higher under the laminar flow hood. ISO Class 8 background with Class 7 laminar flow runs at 15 to 20 air changes per hour at the background. The air change rate is not prescribed by ISO 22716 — the manufacturer establishes the appropriate rate based on a hazard analysis and validates it during commissioning by particle count and recovery testing.

Do I need a hazardous-area assessment for my fragrance room?

If the room ever runs ethanol, isopropanol or fragrance oils with volatile content above approximately 60%, yes — AS/NZS 60079.10.1 hazardous-area classification applies and the room needs a documented dangerous substances and explosive atmospheres assessment. The output is a zone classification (Zone 0, 1 or 2) which then drives the electrical equipment selection, the duct construction (electrically bonded), the exhaust fan rating (ATEX or IECEx) and the ventilation rate (sized for LEL margin).

How does TGO 105 affect HVAC specification for a sunscreen line?

TGO 105 itself prescribes SPF testing methodology and labelling, not facility specification. The flow-down to HVAC comes from the TGA's expectation that a TGA-licensed sunscreen manufacturer operates to PIC/S Good Manufacturing Practice or ISO 22716. Under PIC/S the facility design including HVAC is reviewed during pre-licence inspection. The practical effect is that sunscreen lines almost always specify 316L stainless sealed-seam duct on production zones, HEPA H13 or H14 at the filling head, and full commissioning documentation.

What is the ACCC Cosmetics Information Standard 2020?

The Cosmetics Information Standard 2020 is a mandatory information standard under the Australian Consumer Law that sets out the consumer information required on cosmetic product labels — ingredient list in INCI nomenclature, directions for use where relevant, warnings and other consumer information. It applies to every cosmetic sold in Australia regardless of whether the brand is also TGA-regulated. It does not directly prescribe HVAC, but the traceability requirements it implies are easier to satisfy in a plant with documented environmental monitoring and a documented HVAC commissioning trail.

Can SBKJ supply duct outside Victoria?

Yes. SBKJ supplies cosmetic GMP duct packages across Australia from the Box Hill North VIC operations. Recent deliveries have served Sydney, Brisbane, Perth and Adelaide cosmetic and personal-care plants. Site support during installation and commissioning is provided by SBKJ engineers travelling from Melbourne, with extended on-site time for the most complex configurations (fragrance exhaust, dust collection, sunscreen lines).

What is the lead time on a 316L sealed-seam cosmetic duct package?

Typical lead time from order confirmation to first delivery on site is 10 to 14 weeks for a mid-sized cosmetic GMP plant in 316L stainless, including coil sourcing against mill certificate, fabrication on the SBKJ SBAL-V line, TIG seam welding, pickling and passivation, leakage testing and as-built documentation. Lead time can compress to 8 weeks for repeat configurations and stretch to 18 weeks for fully welded fragrance exhaust packages with hazardous-area certification.

Where this guide fits — related SBKJ insights

This guide is part of SBKJ’s industry-vertical specification library. The most closely related guides for cosmetic and personal-care plant engineers are below.

Talk to an SBKJ engineer about your cosmetic GMP duct package

If your plant is in the design stage, the renovation stage or the audit-remediation stage, an SBKJ senior engineer will walk through the room-by-room specification with you, map your products to the regulatory layer that applies, and prepare an itemised quotation against the duct specification. The first consultation is free and the response time is 12 hours via the contact form, WhatsApp or direct email.

Request an SBKJ cosmetic GMP duct specification consultation →