F-Gas certifiedAir Conditioning Installation London
We supply commercial and domestic air conditioning units and arrange F-Gas certified installation across London — offices, server rooms, shops, restaurants, flats and houses — with clear kW-based prices and a fixed written quote.
Prices by kW
Published commercial and domestic prices.
F-Gas certified
REFCOM registered engineers.
Out-of-hours installs
Evening and weekend commercial work.
5-year warranty
Parts and labour on every system.
- All London postcodes — N, NW, E, EC, SE, SW, W, WC and outer boroughs
Air conditioning installation in London: the short answer
A wall-mounted air conditioning unit in London typically costs £1,500 to £3,300 installed depending on its size in kilowatts (2.5kW to 5.0kW). A commercial ceiling cassette (5–7kW) typically costs £3,000 to £4,600 installed, and a small office VRF system with 5 to 8 zones typically costs £10,000 to £17,000. Every job starts with a free survey and a fixed written quote. Call 07414 254125 to arrange one.
Commercial air conditioning unit prices in London
UK installers size air conditioning in kilowatts (kW) of cooling capacity. BTU/h figures are shown for reference only. Prices include supply, standard installation, electrical connection to a spare circuit and commissioning.
| Unit | Suits | BTU equivalent | Price installed |
|---|---|---|---|
| 2.5kW wall-mounted air conditioning unit installed | Bedroom, small office or consulting room (~20 m²) | ≈8,500 BTU/h | £1,500–£2,200 |
| 3.5kW wall-mounted air conditioning unit installed | Lounge, meeting room or salon (~35 m²) | ≈12,000 BTU/h | £1,800–£2,700 |
| 5.0kW wall-mounted air conditioning unit installed | Open-plan room or small shop (~50 m²) | ≈17,000 BTU/h | £2,200–£3,300 |
| Commercial ceiling cassette air conditioning unit (5–7kW) installed | Office floor, retail unit or restaurant | ≈17,000–24,000 BTU/h | £3,000–£4,600 |
| Small office VRF air conditioning system (5–8 zones) installed | Multi-room office or clinic | Sized per zone | £10,000–£17,000 |
2.5kW wall-mounted air conditioning unit installed
Typically £1,500–£2,200 installed in London. Best for: bedroom, small office or consulting room (~20 m²).
3.5kW wall-mounted air conditioning unit installed
Typically £1,800–£2,700 installed in London. Best for: lounge, meeting room or salon (~35 m²).
5.0kW wall-mounted air conditioning unit installed
Typically £2,200–£3,300 installed in London. Best for: open-plan room or small shop (~50 m²).
Commercial ceiling cassette air conditioning unit (5–7kW) installed
Typically £3,000–£4,600 installed in London. Best for: office floor, retail unit or restaurant.
Small office VRF air conditioning system (5–8 zones) installed
Typically £10,000–£17,000 installed in London. Best for: multi-room office or clinic.
What changes the price: pipe runs over 5 metres, access equipment for upper floors or roofs, new electrical circuits, condensate pumps and out-of-hours working. See the full air conditioning cost guide for a breakdown.
Commercial air conditioning projects in London
Offices
Ceiling cassettes or ducted units for open-plan floors and meeting rooms, with zoned controls so each area can be set separately. Multi-floor offices often suit VRF, where one outdoor system serves many indoor units and can heat and cool at the same time.
Server and comms rooms
Dedicated close-control or high-sensible-cooling units that run all year, often installed with a second unit for backup. Load is calculated from the equipment, not the floor area.
Retail units
Cassettes or ducted systems that keep shop floors comfortable with doors opening all day, plus wall units for stock rooms and offices. Installation can be done before opening or after closing.
Restaurants, gyms and salons
High occupancy and heat from kitchens, equipment and lighting need careful sizing. Systems are positioned to avoid draughts on customers and planned around landlord and acoustic requirements.
F-Gas compliance for London businesses
Most air conditioning systems contain fluorinated refrigerant gases, which are covered by F-Gas regulations. Only F-Gas certified engineers can install, service or decommission these systems, and the business operating the system must keep records and arrange periodic leak checks once the refrigerant charge passes the legal threshold (measured in tonnes of CO₂ equivalent). Installations are carried out by F-Gas certified, REFCOM registered engineers, and you receive an F-Gas record with the refrigerant type, charge and first leak-check date at handover. This record also helps with landlord, insurer and Building Regulations questions.
- F-Gas certified, REFCOM registered engineers
- Fixed written quote listing equipment and kW capacities
- Electrical work notified under Part P where required
- Commissioning and F-Gas record at handover
- 5-year parts and labour warranty
Homes and flats in London
Domestic air conditioning across London usually means a wall-mounted split for a bedroom or loft room, or a multi-split serving two to four rooms from one outdoor unit. Victorian terraces and Edwardian semis normally take the outdoor unit on a rear wall or flat roof. Flats need freeholder or managing agent consent, and conservation areas may need council consent for units on front elevations. A single-room wall-split starts from £1,650 fitted.
London air conditioning installation — FAQs
How much does commercial air conditioning cost in London?
A commercial ceiling cassette (5–7kW) typically costs £3,000 to £4,600 installed, and a small office VRF system with 5 to 8 zones typically costs £10,000 to £17,000. Larger buildings, server rooms and complex access are priced after a survey with a fixed written quote.
What size air conditioning unit does my London office need?
Capacity is measured in kilowatts (kW). As a guide, 2.5kW suits around 20 m², 3.5kW around 35 m² and 5.0kW around 50 m², but offices with many people, computers or large windows need more. A heat-load survey sets the exact size.
Do commercial air conditioning systems need F-Gas checks?
Yes. Systems containing fluorinated refrigerant above the legal threshold need periodic leak checks by an F-Gas certified engineer, and the operator must keep records. Installation is carried out by F-Gas certified, REFCOM registered engineers and you receive an F-Gas record on completion.
Can installation be done outside business hours in London?
Yes. Office, retail and restaurant installations can be phased or carried out in the evening or at weekends to protect trading hours.
Do you cool server and comms rooms?
Yes. Server and comms rooms need dedicated cooling that runs all year, often with a backup unit. These are designed and priced after a survey because the load depends on the equipment installed.
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Supply & installation for homes, offices, shops, restaurants, HMOs and commercial premises across London. An F-Gas engineer replies within one working day.
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