What Woojin I&S does

Woojin I&S (KOSPI: 010400), founded in 1975 and headquartered in Seoul, is a specialist Korean mechanical and fire-protection equipment subcontractor for large-scale construction projects, with a particular focus on semiconductor fabrication facilities, data centers, and high-rise commercial and residential buildings. The company designs, fabricates, and installs HVAC, water-supply/drainage, sprinkler, fire-detection, and gas-suppression systems, operating from a Cheonan manufacturing complex (Plants 1 and 2), a Giheung logistics center, and a China subsidiary established in 2014. Its core manufactured products are fluororesin (PTFE, PFA, FEP, ETFE, CPT)-coated duct and piping and multi-axis rotational lining systems, certified to FM 4922 and FM Approvals (Semi-Con DUCT+, ROTOFLON-Lining+), which supply semiconductor and LCD fabs operated by Samsung Electronics, SK Hynix, and LG Display. Woojin also markets two proprietary construction methods — IDC Differentiated Construction and the P.F.P. (Prefabricated Pipe) system — that use 3D design and factory pre-assembly to reduce on-site labor by approximately 50%.

The company earns revenue primarily through project-based construction contracts awarded via formal nomination (지명) from major Korean general contractors (Hyundai E&C, Lotte E&C, Posco E&C, SK Eco Plant, Shinsegae E&C, Samsung Engineering, GS E&C) and through direct product sales to industrial clients, with a smaller facilities-maintenance services stream under its KT Estate partnership. FY2025 revenue was KRW 164,458 million (a 19.5% YoY increase from KRW 137,588 million in FY2024) and the company returned to profitability with net income of KRW 7,593 million, recovering from a FY2024 net loss. Recent strategic actions include a pre-Series A strategic investment in AI water-infrastructure startup Irum Technology (May 2026), a Vietnam construction-materials distribution partnership with VABM and Woncan Networks (April 2025), and a KRW 15.3 billion mechanical equipment contract from Posco E&C in November 2025, all of which point to a deliberate effort to broaden the business beyond its traditional Korean semiconductor/GC subcontracting base.

Name

Woojin I&S

Legal name

주식회사 우진아이엔에스 CO., Ltd.

Website

https://woojini.com

Company type

Public

Founded year

1975

Operating status

Operating

Headcount range

101–250 employees

Short description

Woojin I&S (KOSPI: 010400) is a Korean specialist subcontractor that designs, fabricates, and installs mechanical, fire-protection, and fluororesin-coated duct/piping systems for semiconductor fabs, data centers, and large buildings, serving Samsung Electronics, SK Hynix, LG Display, and major Korean general contractors.

Ownership category

akta.pro rank

Product category

Specialty Mechanical and Fire Protection Construction

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Plumbing, Heating, and Air-Conditioning Contractors (23822), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (3334)

SIC

Wholesale-Hardware & Plumbing & Heating Equipment & Supplies (5070), Steam & Air-Conditioning Supply (4961), Fabricated Plate Work (Boiler Shops) (3443)

akta.pro primary industry

Fire Protection Systems Contracting (Sprinklers, Alarms, Suppression) (IMAFALAD)

akta.pro secondary industries

Fire Sprinkler System Installation & Retrofit (IMAIAJAB), Fire Protection Piping & Sprinkler System Components (IMADALAJ), HVAC & Industrial Ventilation (Chillers, AHUs, Exhaust, Filtration) (EUAEAFAE)

Keywords

• Mechanical facility construction
• Fire protection equipment
• Fluorine resin coating
• Data center mechanical systems
• Semiconductor exhaust duct

Headquarters

HQ city

Seoul

HQ country

South Korea

HQ region

Asia

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Construction Project Revenue: Woojin I&S generates the majority of its revenue from mechanical and fire protection equipment construction contracts awarded by general construction companies and developers. Projects span data centers, semiconductor fabs, commercial buildings, residential complexes, and industrial facilities. Revenue is project-based and recognized over the construction period. FY2025 revenue was KRW 164,458 million.
2. Manufacturing and Product Sales: The company manufactures and sells proprietary duct and piping products including fluorine resin-coated duct, system duct, rotational lining products, and HOOK-UP pipe & fitting components. Products are supplied to semiconductor, chemical, pharmaceutical, power generation, and other industrial clients. Revenue recognized upon product delivery.
3. Facilities Maintenance and Services: Woojin I&S holds a facilities maintenance management business license and provides ongoing maintenance services for installed mechanical and fire protection systems.

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

Woojin I&S is a specialty mechanical and fire protection contractor and manufacturer that designs, fabricates, and installs mechanical equipment, HVAC, plumbing, sprinkler/fire detection systems, prefabricated (P.F.P.) and modular piping, and proprietary fluorine-resin coated duct and piping for buildings, data centers, semiconductor fabs, and industrial facilities. The company also manufactures its own products (rotational lining, system duct, HOOK-UP pipe & fittings) at its Cheonan factory and provides facilities maintenance services.

Product overview

Woojin I&S is a comprehensive engineering and manufacturing company offering integrated facility construction and fluororesin-coated products for high-tech industries. The company operates three main business divisions: (1) Facility Division covering mechanical/fire protection equipment, P.F.P. modular piping systems, and IDC differentiated construction methods for data centers; (2) Manufacturing Division producing fluororesin coatings (ETFE, CPT), rotational lining products, system ducts, and HOOK-UP piping systems; and (3) R&D Division developing modular piping, system ducts, and renewable energy technologies. The product portfolio centers on corrosion-resistant duct and piping systems for semiconductor, LCD, petrochemical, nuclear, pharmaceutical, and secondary battery manufacturing facilities, supported by factory-based precision manufacturing at their Cheonan plant and 3D/BIM-enabled design capabilities.

Differentiator

Problem solved

Functional benefit

Brands

• P.F.P. System: Prefabricated Pipe package system — factory-manufactured, package-assembled pipe system enabling rapid on-site installation for vertical/horizontal pipes, mechanical rooms, and utility conduits
• IDC 차별화 공법
• 불소수지 코팅 (Fluororesin Coating)
• 회전성형 라이닝 (Rotational Lining)
• HOOK-UP PIPE & FITTING
• 시스템 덕트 (System Duct)

Products and services

• Mechanical and Fire Protection Equipment (기계 및 소화 설비)

Quantifiable outcome

• IDC construction method reduces on-site worker count by approximately 50% and significantly lowers safety incident risk
• +4 more outcomes

Named customers15 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability3 records

Feature8 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Irum Technology (이룸기술)coreStrategic or Co-development Partner · 12 February 2026AI-based smart water pipe network management technology partnership. Irum Technology provides 'AquaVision.AI' platform with 95%+ leak detection accuracy for water pipe networks. Woojin I&S contributes mechanical/fire protection installation expertise for pipe and facility construction. MOU signed February 2026, followed by pre-Series A investment (May 2026). Jointly pursuing turn-key AI control + construction solutions for municipal water infrastructure modernization, data center pipe monitoring, and international markets (UAE, USA, Indonesia, Pakistan).
• Woncan Networks (원캔네트웍스)minorStrategic or Co-development Partner · 28 April 2025Vietnam construction material distribution digital transformation MOU signed at CONTECH VIETNAM 2025 with Vietnam Construction Materials Association (VABM). Woncan Networks will establish a Hanoi branch for digital system deployment and operations. Woojin I&S supports stable system introduction and operation leveraging its construction equipment expertise. Jointly promoting digital distribution services in Vietnam.
• Vietnam Construction Materials Association (VABM)minorStrategic or Co-development Partner · 28 April 2025Vietnam Construction Materials Association (VABM) signed MOA with Woojin I&S and Woncan Networks at CONTECH VIETNAM 2025. VABM will leverage its association network to promote the digital system, educate Vietnamese construction companies, and facilitate stable material purchases through the platform.
• Oksu Development (옥수개발)minorStrategic or Co-development Partner · 17 August 2023ESG enhancement MOU signed in August 2023. Nature and scope of cooperation focused on strengthening ESG practices.
• Nihondaishoku ( 일본 니혼다이쇼쿠 )coreTechnology or IntegrationTechnology transfer agreement signed in June 2015 for rotational molding (ROTOFLON) technique to introduce and domesticate rotational lining technology in South Korea. Woojin I&S serves as the exclusive or primary Korean partner for this technology, producing rotational lining products (SUPER ETFE) for semiconductor, chemical, and pharmaceutical industries.

Scale indicators9 records

Recent moves11 records

Expansion highlights6 records

Broad incumbents

• Carrier Global: Global leader in HVAC, refrigeration, and fire/security. Comparable as a broad incumbent supplying mechanical and fire protection equipment into the same data center, commercial real estate, and industrial facility verticals.
• Lennox International: Global HVAC systems and refrigeration provider. Comparable as a broad incumbent in commercial heating, cooling, and ventilation equipment with overlapping data center and commercial building exposure.
• Daikin Industries: Global HVAC and fluorochemical market leader with overlapping fluoropolymer coating technology and HVAC equipment manufacturing. Competes indirectly through technology licensing and equipment supply into the same semiconductor and data center end markets.
• Atkore Inc. US manufacturer of electrical, mechanical, and safety infrastructure products including conduit, cable, and engineered duct/pipe solutions. Comparable as a broad incumbent supplying fabricated mechanical infrastructure into data center, commercial, and industrial construction.
• Trane Technologies: Global HVAC and building services leader. Comparable as a broad incumbent in commercial and industrial HVAC, refrigeration, and building automation with overlapping data center cooling and mechanical systems exposure.

Regional players

• AGC Inc. Japanese fluorochemicals and specialty materials manufacturer with ETFE, PFA and related fluoropolymers used in semiconductor and chemical processing duct and piping. Comparable as a fluororesin supplier competing in the same semiconductor exhaust lining category.
• Asahi Kasei Engineering: Japanese fluoropolymer and specialty chemical producer with comparable fluororesin coating applications in semiconductor and chemical plants. Regional adjacency in coating technology and semiconductor-grade materials.

Emerging players

• Daiwa House Industry: Japan's largest homebuilder and a leader in modular/prefabricated construction. Comparable as an emerging player in modular and prefabricated building systems, including data center and industrial facilities, an area where Woojin's IDC differentiated method is positioned.

Direct peers

• TaeChang Industrial: Korean specialty mechanical and HVAC contractor serving construction and industrial facility markets with similar design-fabricate-install capabilities. Direct competitor for mechanical equipment and fire protection bids on Korean construction projects.
• Sambu Engineering & Construction: Korean specialty contractor active in mechanical, electrical, and fire protection construction. Competes for similar GC-nominated mechanical and fire protection scopes across Korean commercial, residential, and industrial construction.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UClK7WyW_XOnZBxDdfUMDbXA

Compliance11 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Woojin I&S