TSIC Activity

Heating installation

ประกอบกิจการรับซ่อมแซมรื้อถอนเตาหลอม ก่ออิฐและปูน ด้วยวัสดุทนไฟ ทนความร้อน

What this activity covers

Companies in this sector install, repair, and maintain heating systems and related piping.

Heating system installation — Installation of heating systems including electric, gas, and oil
Heating system maintenance — Repair and maintenance of heating systems and equipment
Piping installation — Installation of piping for heating systems
Central heating systems — Installation and maintenance of central heating systems
Gas piping services — Installation and maintenance of gas piping, including medical gas
Solar water heaters — Installation of solar water heating systems

What companies here also do

Seen in real company registrations under this code — beyond the official definition, so licensing may differ.

Air duct installation — Installation of air duct systems
Industrial gas systems — Installation of gas systems for industrial use
Thermal system contracting — Contracting services for thermal systems

Not included here

Construction of pipelines (water, oil, gas and other liquids) for long-distance, urban or local pipeline construction for public utility projects. See activity 42201.
Installation of electrical panels to control heating. See activity 43210.

Foreign ownership

List 3: Restricted, FBL/BOI route availableinherited from 43

Construction, except construction of infrastructure providing basic public services in public utilities or transport that requires special apparatus, machinery, technology or expertise, and except other categories prescribed in ministerial regulations

The infrastructure carve-out is subject to a minimum foreign capital requirement, subject to capital thresholds, verify current figures.

FBA B.E. 2542, List 3 (10)Routes: Foreign Business Licence, BOI promotion, US Treaty of Amity

Auto-mapped, verify against the Act. These TSIC mappings are indicative, not legal advice; the schedules of the Foreign Business Act B.E. 2542 are the authority. See the full foreign ownership reference.

Industry at a glance

as of 23 ก.ค. 69

The whole registered industry under this activity, every registration year, from the DBD DataWarehouse.

217

active companies operate here

฿1.7Bregistered capital, combined

฿1.6B

Sector revenue · 2025

+8% since 2023

฿29.7M

Net profit · 2025

99 profitable

202320242025

net profitrevenue

Foreign investment

new registrations · 2026 YTD

0%of new registered capital is foreign-held

฿0 foreign฿13.5M Thai

Almost entirely Thai-held — little foreign capital enters here.

New in 2026

12+300.0%

registrations, YTD

Registered capital

฿1.7B+10.1%

since year-end

Largest by revenue

Latest filed-year revenue, not a multi-year total

Largest by registered capital

1Industrial Construction and Maintenance Services Public Company LimitedRayong฿1.0B
2Garanty Engineering Co., Ltd.Bangkok฿50.0M
3Geary War Co., Ltd.Samut Prakan฿46.0M

Source: Department of Business Development DataWarehouse. Financial figures are combined totals of companies that filed statements; revenue and profit shown for the latest three reporting years.

Companies registered since 2022

Browse all

New DBD registrations under this activity since 2022, the period the registry snapshot covers, not the full historical register.

Registered

since 2022

Still active

Dissolved

฿1.0M

Median capital

of active

New registrations per year

2022peak 12 in 20222026

Largest active companies by registered capital

Source: Department of Business Development (DBD) new-registration records, 2022 to present. Counts cover companies first registered in that window, reflect the latest snapshot load, and may lag the live register.

Emerhub

Restricted activity? There is usually a route.

Emerhub structures foreign-owned companies around FBA restrictions: Foreign Business Licence applications, BOI promotion, and compliant shareholding structures. Talk through your case before you commit to one.

Talk to Emerhub Thailand