What HVAC duct standard applies in Thailand?

TIS (Thai Industrial Standards) provide local baseline. SMACNA dominates on international FDI, EEC manufacturing projects, hyperscale data centre, international hospitality. JIS appears on Japanese-led FDI (Toyota, Honda, Mazda — Thailand is a major Japanese automotive base). EN 1505 on European-led FDI. ASHRAE 90.1/62.1 widely referenced.

What is the EEC and why does it matter?

Eastern Economic Corridor (EEC) is Thailand's flagship industrial development zone covering Chonburi, Rayong and Chachoengsao provinces. EEC offers tax incentives (8-13 year corporate income tax exemption), land lease at attractive rates, and streamlined permitting. EEC is the preferred location for new manufacturing FDI especially automotive, electronics and aerospace. HVAC fabricators serving EEC FDI projects typically locate within or adjacent to EEC industrial parks.

Where should I locate an HVAC duct fab shop in Thailand?

Greater Bangkok (Pathum Thani, Samut Prakan, Nonthaburi): largest market, deepest sheet metal industry. Rayong/Chonburi (EEC): closest to automotive and electronics FDI manufacturing. Ayutthaya: established industrial zone, automotive supplier cluster. Chachoengsao (within EEC): emerging industrial corridor. Greater Bangkok has the deepest commercial real estate market; EEC has the strongest manufacturing FDI demand.

What is the capex for a Thai HVAC duct fab shop?

Equipment ex-works SBKJ approximately USD 480,000-625,000. Add 8-15% for freight to Laem Chabang or Bangkok port plus Thai customs (industrial machinery 5-10% basic duty plus 7% VAT, with BOI promotion exemption common for EEC operations). Add USD 35,000-90,000 for building lease and utilities. Total turnkey: USD 540,000-810,000. BOI-promoted EEC operations save USD 30,000-65,000 via duty exemption.

What is typical Thai HVAC fab labour cost?

Approximate fully-loaded annual cost (2026, USD): senior fitter / supervisor USD 10,000-18,000; HVAC fitter USD 5,500-11,000; auto duct line operator USD 7,500-14,000; sheet metal welder USD 8,500-15,000; QA/QC engineer USD 18,000-30,000; project manager USD 28,000-48,000. Thai engineering talent is strong; Chulalongkorn, KMUTT, Mahidol produce qualified mechanical engineers.

Insights · Thailand playbook

Thailand HVAC Duct Fabrication — 2026 EEC and FDI Playbook

A practical playbook for the Thai HVAC duct fabrication market in 2026. Covers TIS standards, the Eastern Economic Corridor (EEC) tax-incentive zone, BOI promotion benefits, the automotive and electronics FDI demand drivers (Toyota, Honda, Mazda, Nissan, Sony, Western Digital), location selection across Greater Bangkok / Rayong / Chonburi / Ayutthaya / Chachoengsao, equipment capex, labour cost and the SBKJ equipment list for Thai fabricators. Built from SBKJ deployments at Thai fabricators since 2018.

By SBKJ Engineering Team · Published May 1, 2026 · 9 min read · Reviewed by SBKJ QA & Engineering

Why Thailand in 2026

Thailand is a mature ASEAN manufacturing hub with deep automotive industry (the "Detroit of South-East Asia"), strong electronics manufacturing and a fast-growing data centre cluster. The Eastern Economic Corridor (EEC) provides tax incentives that drive concentration of new manufacturing FDI in Chonburi, Rayong and Chachoengsao. SBKJ has supplied auto duct lines and spiral tubeformers to Thai fabricators serving major EEC projects since 2018.

Standards and codes

TIS (Thai Industrial Standards) — local baseline
Building Energy Code — energy efficiency requirements
SMACNA — dominant on international FDI, EEC, hyperscale, hospitality
JIS — Japanese-led FDI (Toyota, Honda, Mazda, Nissan, Mitsubishi, Isuzu)
EN 1505 — European-led FDI
ASHRAE 90.1, 62.1 — referenced on international system designs
TREES (Thai Rating of Energy and Environmental Sustainability) — local green building rating

2026 demand drivers

Automotive FDI: Toyota, Honda, Mazda, Nissan, Mitsubishi, Isuzu — Thailand is the largest automotive manufacturer in ASEAN. Continuing EV transition (BYD, Great Wall, BMW EV).
Electronics FDI: Sony, Western Digital, Seagate, Hana Microelectronics, Delta Electronics. EEC has emerging semiconductor packaging FDI.
EEC infrastructure: U-Tapao Airport expansion, EEC high-speed rail, Eastern Aviation City.
Hyperscale data centre: STT GDC (Bangkok, Bang Na), AIS, NTT Telcom, Equinix, ST Telemedia, Microsoft Azure planning.
Commercial real estate: Bangkok CBD (Sukhumvit, Sathorn, Silom), Phuket commercial.
Tourism megaprojects: Phuket, Koh Samui, Pattaya expansion.
Healthcare modernisation: Bumrungrad, Bangkok Dusit Medical Services, BNH expansion.
Pharmaceutical: GPO and Pharma FDI manufacturing.

EEC and BOI promotion

EEC offers significant tax and operational benefits for new manufacturing investment:

Corporate income tax exemption for 8-13 years depending on activity classification
Import duty exemption on machinery and raw materials for export production
Smart Visa for foreign experts
Land lease at attractive industrial park rates
Streamlined permitting via EEC Office (EECO) one-stop service

BOI (Board of Investment) approval is required to access EEC benefits. The application process takes 60-90 days and requires demonstrated value-add commitment. Most HVAC duct fabricators serving EEC FDI customers register under BOI to access duty-free machinery import.

Location selection

Greater Bangkok (Pathum Thani, Samut Prakan, Nonthaburi): largest market, deepest sheet metal industry. Industrial parks: Bangkadi, Bangphoo, Bang Pa-In. Land lease ~USD 30-65/m²/year.
Rayong / Chonburi (EEC): closest to automotive and electronics FDI. WHA, Amata City, Hemaraj industrial estates. Land lease ~USD 25-55/m²/year with BOI benefits.
Ayutthaya: established automotive supplier cluster, Hi-Tech industrial estate, Bangpa-In industrial estate. Land lease ~USD 25-50/m²/year.
Chachoengsao (EEC north zone): emerging EEC industrial corridor.

Capex with BOI exemption

Equipment ex-works SBKJ approximately USD 480,000-625,000. Add 8-15% for freight to Laem Chabang Port plus Thai customs. With BOI-promoted EEC registration: machinery import duty-free, saving USD 30,000-65,000. Add USD 35,000-90,000 for building lease and utilities. Total turnkey capex (BOI-promoted): USD 540,000-810,000.

Thai labour cost

Senior fitter / supervisor: USD 10,000-18,000/year
HVAC fitter (skilled): USD 5,500-11,000/year
Auto duct line operator: USD 7,500-14,000/year
Sheet metal welder (qualified): USD 8,500-15,000/year
QA/QC engineer (graduated): USD 18,000-30,000/year
Project manager: USD 28,000-48,000/year

Thai engineering talent is strong; Chulalongkorn University, KMUTT, Mahidol produce qualified mechanical engineers. Sheet metal labour pool is deep in Greater Bangkok and Eastern Seaboard.

SBKJ Thailand-ready package

SMACNA + EN 1505 + JIS + TIS multi-standard PLC recipes pre-loaded
FAT certificate at SMACNA Class A leakage
Thai 380V/50Hz electrical wiring
Thai-language quick-reference operator card
BOI documentation support for machinery import
72-hour WhatsApp response with English/Mandarin support
Authorised distributor relationships in Bangkok and Rayong

Get a Thailand-ready SBKJ quotation →

FAQ

What HVAC duct standard applies?

TIS baseline; SMACNA dominant on international FDI/EEC/hyperscale; JIS on Japanese FDI; EN 1505 on European FDI.

What is the EEC?

Eastern Economic Corridor — flagship industrial development zone in Chonburi/Rayong/Chachoengsao with 8-13 year corporate tax exemption, duty-free machinery import, attractive land lease.

Where should I locate?

Greater Bangkok (largest), Rayong/Chonburi EEC (FDI proximity), Ayutthaya (automotive supplier cluster), Chachoengsao (EEC north).

What is the capex?

USD 540-810K turnkey BOI-promoted EEC, saving USD 30-65K via duty-free machinery import. Without BOI USD 580-870K.

What is typical labour cost?

Senior fitter USD 10-18K, fitter USD 5.5-11K, line operator USD 7.5-14K, welder USD 8.5-15K, QA engineer USD 18-30K.

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