432201Air-conditioning and ventilation system, installation and maintenance
空氣調節及通風系統安裝及保養
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 air-conditioning and ventilation systems, including air ducts and ventilation shafts. It encompasses all related services necessary to ensure these systems operate efficiently and effectively.
This classification includes
- air duct for air-conditioning system, installation and maintenance
- air-conditioning system, installation and maintenance
- air-ventilation shaft, installation
- ventilation system, installation and maintenance
Classified elsewhere
These activities look similar but belong under different codes.
- air duct for air-conditioning system, manufacturing and installation
- household air-conditioner, installation and maintenance
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
LowThis activity is typically tied to Hong Kong premises and customers. Services are usually performed on-site, and contracts are often negotiated with local clients. Therefore, it does not qualify for offshore non-taxable treatment.
Business registration wording
Suggested business nature for this activity
English
AIR-CONDITIONING AND VENTILATION SYSTEM SERVICES
48/60 characters
Chinese 中文
空氣調節及通風系統服務
11/30 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, you need to comply with local regulations and may require specific licenses for installation and maintenance.
What are the tax implications for this business?
Profits from this business are subject to Hong Kong profits tax as it is considered a local service.
Can I operate this business without a physical office?
While possible, having a physical presence is advisable for service delivery and client interactions.
Incorporate in Hong Kong
Starting a air-conditioning and ventilation system, 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