432299Combined and other ventilation, gas and water fitting, installation and maintenance
綜合及其他通風、燃氣及水務設備安裝及保養
Why 6 digits?
HSIC subclasses are 6 digits. The first four match the international ISIC class; Hong Kong adds a two-digit local suffix for finer detail, especially across its import and export trade, so a code steps from a 4-digit class straight to a 6-digit subclass. More on the HSIC structure.
This activity involves the installation and maintenance of combined systems for ventilation, gas, and water fittings, as well as other related works not classified elsewhere. It encompasses a variety of tasks that ensure the proper functioning and safety of these essential systems in buildings.
This classification includes
- combination of works in Industry Sub-classes 432201 to 432204
- ventilation, gas and water fitting, installation and maintenance, n.e.c.
Licences and approvals
What this activity needs to operate
No sector-specific licence applies to this activity. It can be set up as a standard Hong Kong company without extra regulatory approvals. Premises-based or product-based permits can still apply case by case; Emerhub confirms the exact position during scoping.
Offshore profits claim feasibility
MediumThis activity often requires physical presence in Hong Kong for installation and maintenance services. Contracts are typically negotiated locally, and services are performed on-site, making it challenging to qualify for offshore treatment.
Business registration wording
Suggested business nature for this activity
English
VENTILATION, GAS AND WATER FITTING INSTALLATION SERVICES
56/60 characters
Chinese 中文
通風燃氣水務設備安裝
10/30 characters
Industry statistics
How large is this sector in Hong Kong?
Official figures are compiled at industry level. These are for Construction (F), the industry this classification belongs to.
27,200
Establishments (2023)
195,800
Persons engaged (2023)
C&SD Annual Survey of Economic Activities 2023Verified 2026-07-14
Standard compliance
Compliance every Hong Kong company shares
Beyond anything specific to this activity, every Hong Kong company handles two-tiered profits tax, the annual return (Form NAR1) within 42 days of its incorporation anniversary, audited accounts, MPF enrolment for staff, and a company secretary. Emerhub runs all of it on your behalf.
See the full Hong Kong compliance calendarFrequently asked questions
Do I need a license for installation?
Yes, specific licenses may be required for gas and water fitting installations.
What are the tax implications?
Profits from this activity may be subject to Hong Kong profits tax unless offshore conditions are met.
Can I operate without a local office?
Having a local office is advisable for effective service delivery and compliance with local regulations.
Incorporate in Hong Kong
Starting a combined and other ventilation, gas and water fitting, installation and maintenance business in Hong Kong?
Emerhub incorporates your company, registers the business nature above with the IRD, files every licence application, and runs your company secretary and compliance calendar. You provide the documents; Emerhub handles every government interaction.
Start incorporation with Emerhub