Why Korea in 2026
Korea is the world's largest memory semiconductor manufacturer (Samsung and SK hynix combined produce over 60% of global memory) and home to three of the world's largest EV battery manufacturers (LG Energy Solution, Samsung SDI, SK On). The 2026 demand profile is dominated by Samsung's Pyeongtaek P3/P4 expansion, the Yongin Mega-Cluster (300 trillion KRW investment by 2042), SK hynix Cheongju M16 and Yongin expansion, and the K-Battery Belt expansion. Cleanroom HVAC for semiconductor megafabs is the highest-margin segment and demands ISO 14644 Class 5 quality with continuous-weld stainless duct construction.
Standards and codes
- KS B 6361 — Korean Standard for HVAC ductwork
- KS F 2402 — testing methods for ducts
- SMACNA — dominant on Samsung, SK hynix and major FDI cleanroom projects
- JIS — applies on Japanese-led FDI
- ASHRAE 90.1, 62.1 — widely referenced
- KOSHA standards — Korea Occupational Safety and Health Agency
- ISO 14644 — cleanroom classifications for semiconductor and pharma
- SEMI F49 and SEMI F66 — semiconductor industry-specific HVAC clauses for sub-fab and chase work
2026 demand drivers
- Samsung semiconductor: Pyeongtaek P3 and P4 fab expansion, Yongin Mega-Cluster (5 fabs by 2042), Hwaseong fab modernisation. World's largest planned semiconductor capacity expansion.
- SK hynix: Cheongju M16, Yongin expansion, overseas modernisation. Major HBM (High Bandwidth Memory) capacity expansion.
- K-Battery Belt: LG Energy Solution Cheongju and Ochang, Samsung SDI Cheonan, SK On Seosan and Cheongju. Korean battery makers also have major US (Georgia, Tennessee, Indiana) and EU footprint requiring HVAC duct supply.
- Display: Samsung Display Tangjeong (OLED), LG Display Paju (OLED).
- Shipbuilding: HD Hyundai Heavy Industries (Ulsan), Samsung Heavy Industries (Geoje), Hanwha Ocean (Geoje).
- Pharmaceutical and biotech: Samsung Biologics Songdo (world's largest CMO with Plant 5), Celltrion, SK Biopharm.
- Commercial real estate: Seoul Gangnam, Yongsan, Songdo IBD.
- Healthcare modernisation: KOMA hospital programme.
- Hyperscale data centre: Naver Cloud, Kakao, KT, Microsoft Korea, Equinix Korea.
Semiconductor cleanroom HVAC — what makes Korea different
Samsung and SK hynix semiconductor megafabs are the largest single HVAC duct supply contracts in the world. A new Samsung memory fab can require 50,000-100,000 m² of HVAC ductwork over 18-30 months of construction. Specifications:
- ISO 14644 Class 5 or tighter cleanroom envelope
- Stainless steel 316L primary, electropolished interior surface (Ra 0.4 µm)
- Continuous TIG-welded transverse joints and longitudinal seams
- Sub-fab ductwork per SEMI F49 with chemical resistance for solvent and acid exhausts
- FFU (Fan Filter Unit) integration with HEPA/ULPA filters
- Dedicated process exhaust (acid scrubber, solvent abatement, flammable scrubber)
- Tight leakage class — typically zero allowable on critical air-handling sections
For HVAC duct fabricators, semiconductor megafab supply is a specialist segment requiring stainless coil decoiler, polished tooling, TIG welding stations and electropolishing capability. SBKJ supplies the SBTF-1500 with stainless package and the SB-FS1535L stainless rectangular duct line as the standard equipment package for semiconductor cleanroom fabricators.
K-Battery Belt — the second engine
The K-Battery Belt connecting Cheongju, Ochang, Cheonan, Seosan in Chungcheongbuk-do and Chungcheongnam-do hosts the manufacturing facilities of the three Korean battery majors. Battery facility HVAC is high-margin (large industrial buildings, dust control requirements, dry room environment for cell assembly). Specifications:
- Dry room HVAC with extremely low dew point (-40°C to -60°C) for electrolyte filling areas
- NMP (N-Methyl-2-pyrrolidone) recovery exhaust on coating lines
- Fire-rated construction in electrolyte storage areas
- Cleanroom HVAC for cell assembly (typically ISO 14644 Class 7-8)
- Tight leakage class for energy efficiency (PUE-equivalent metrics)
Location selection
- Greater Seoul / Gyeonggi (Suwon, Anyang, Gunpo, Ansan): largest market, deep sheet metal industry, near Pyeongtaek and Yongin semiconductor megafabs. Land lease KRW 80,000-180,000/m²/year (USD 60-135/m²).
- Cheongju (Chungcheongbuk): SK hynix and K-Battery Belt cluster. Land lease KRW 50,000-110,000/m²/year.
- Cheonan / Asan / Seosan (Chungcheongnam): Samsung Display, K-Battery, automotive. Land lease similar to Cheongju.
- Pohang / Ulsan (Gyeongsangbuk / Gyeongsangnam): heavy industry, shipbuilding, automotive (Hyundai Motor). Land lease KRW 40,000-90,000/m²/year.
- Gumi / Daegu: electronics manufacturing.
- Songdo (Incheon): Samsung Biologics, Celltrion biotech cluster. Industrial land scarce, premium.
Capex with Korean customs
Equipment ex-works SBKJ approximately USD 480,000-625,000. Add 8-12% for freight to Busan or Incheon port plus Korean customs (industrial machinery 0-8% basic duty depending on HS classification, plus 10% VAT recoverable). Add USD 50,000-150,000 for building lease and utilities. Total turnkey capex: USD 580,000-880,000. KORUS FTA reductions and Korea Free Trade Zone benefits can apply for export-oriented operations.
Korean labour cost
- Senior fitter / supervisor: USD 38,000-62,000/year
- HVAC fitter (skilled): USD 22,000-40,000/year
- Auto duct line operator: USD 24,000-42,000/year
- Sheet metal welder (qualified): USD 28,000-48,000/year
- QA/QC engineer: USD 45,000-75,000/year
- Project manager (B.E. or M.E.): USD 60,000-105,000/year
Korean engineering talent is exceptional, particularly for semiconductor cleanroom HVAC. Many former Samsung and SK engineers operate independent contracting firms — high-skill, high-margin segment. Korean labour cost favours automation; SBAL-V payback for Korean fabricators is typically 18-26 months.
SBKJ Korea-ready package
- SMACNA + EN 1505 + KS B 6361 + JIS multi-standard PLC recipes
- FAT certificate at SMACNA Class A leakage
- Korean 380V/60Hz electrical wiring
- Korean-language operator quick-reference card
- Stainless duct package available for semiconductor cleanroom fabricators (SBTF-1500 stainless, SB-FS1535L)
- SEMI F49/F66 specification documentation support
- 72-hour WhatsApp response with English/Mandarin support; Korean-speaking partner available
- Authorised distributor relationships in Greater Seoul and Cheongju
Get a Korea-ready SBKJ quotation →
FAQ
What HVAC duct standard applies in Korea?
KS B 6361 baseline. SMACNA dominant on Samsung/SK hynix semiconductor cleanrooms and FDI. JIS on Japanese-led FDI. ISO 14644 for cleanroom classifications. SEMI F49/F66 for semiconductor sub-fab.
What sectors drive demand?
Samsung Pyeongtaek/Yongin semiconductor expansion, SK hynix Cheongju/Yongin, K-Battery Belt (LGES/Samsung SDI/SK On), Samsung Biologics Songdo, shipbuilding, display, hyperscale data centre.
Where should I locate?
Greater Seoul/Gyeonggi (largest, near Pyeongtaek and Yongin), Cheongju (SK hynix + battery cluster), Cheonan/Asan/Seosan (display, battery, automotive), Pohang/Ulsan (heavy industry), Songdo (biotech).
What is the capex?
USD 580-880K turnkey. Add stainless duct package for semiconductor cleanroom (USD 80-120K incremental).
What is typical labour cost?
Senior fitter USD 38-62K, fitter USD 22-40K, line operator USD 24-42K, welder USD 28-48K, QA engineer USD 45-75K, project manager USD 60-105K. Korean cleanroom HVAC engineering is world-class.
