Split and multi-split systems in Carshalton
Cooling and heating for offices, shops and hospitality venues in Carshalton, with a free site survey and a fixed written quote.
- Free site survey and fixed written quote
- Unit sizes, refrigerant and price set out in writing
- Work planned around your opening hours
How much does a split air conditioning system cost in Carshalton?
Our guide range in Carshalton is £1,850–£3,795 per system before VAT; a typical job (two-room multi-split) is £4,395–£7,595 plus VAT. Your exact price is fixed in writing once we have surveyed.
A split air conditioning system has an indoor unit and an outdoor unit joined by refrigerant pipework.
Where we work around Carshalton
Premises in Carshalton are often in mixed-use buildings with shared roofs and tight access, so outdoor unit positions are agreed early.
We cover every Carshalton postcode, including SM5. Nearby, we also cover Wallington (about 1 km), Sutton (about 3 km) and Mitcham (about 4 km). In Carshalton, outdoor unit positions are often the deciding factor: a rear flat roof or yard is usually straightforward, while a front elevation may need landlord or planning consent first.
Included as standard
- Survey and unit sizing
- Outdoor unit on wall brackets, a flat roof frame or ground mounts
- Pipework in neat trunking or concealed routes
- Condensate drainage
- Commissioning, remote or wired controls and F-gas records
Guide prices in Carshalton
Prices below include our regional adjustment for London (28% above the UK guide).
| Item | Guide price (ex VAT) | Inc VAT | Basis |
|---|---|---|---|
| Single split 2.5–3.5 kW | £1,850–£3,150 | £2,220–£3,780 | per system |
| Single split 5–7 kW | £2,500–£3,795 | £3,000–£4,554 | per system |
| Multi-split, 2 indoor units | £4,395–£7,595 | £5,274–£9,114 | per system |
| Multi-split, 3–4 indoor units | £6,350–£12,750 | £7,620–£15,300 | per system |
| Extra pipework beyond 5 m | £45–£85 | £54–£102 | per metre |
Ex VAT, supply and install with standard access.
How a job in Carshalton works
Survey
We size the unit to the room and agree indoor and outdoor positions and the pipe route.
Mount the units
Indoor unit on a mounting plate, outdoor unit on brackets or a frame with anti-vibration mounts.
Pipe and wire
Pipework, interconnecting cable and condensate are run and made off neatly. We keep work areas in Carshalton screened and tidy at the end of each day.
Test and commission
Pressure test, evacuation, any extra refrigerant charge, then commissioning and handover.
Things to check in Carshalton
Pipe routes
Shorter, simpler pipe routes are cheaper and more reliable. We plan routes before quoting.
Conservation areas
Historic streets and listed buildings in and around Carshalton are more likely to need planning permission for outdoor units on visible elevations. We check with the local planning authority before work is booked.
Refrigerant rules
Since 1 January 2025, new single split systems holding under 3 kg of refrigerant in Great Britain cannot use refrigerant with a GWP of 750 or more — in practice, R32 or lower.
Leased premises
If your Carshalton premises are leased, the landlord's written consent is usually needed for external units, wall penetrations and roof access. We provide drawings and data sheets for the request.
Premises we work in around Carshalton
- Warehouses and industrial: cooling for offices, mezzanines, control rooms and temperature-sensitive areas.
- Gyms and leisure: high-capacity cooling and fresh air for gym floors, studios and changing rooms.
- Salons and spas: comfortable salons and treatment rooms despite dryers, lamps and steam.
- Healthcare and dental: clean, quiet cooling for surgeries, clinics, dental practices and care settings.
In England, systems holding 5 tonnes CO2 equivalent of refrigerant or more fall under GB F-gas rules, with regular leak checks and records; buildings with more than 12 kW of air conditioning in total also need a periodic energy inspection.
Your questions answered
How much does a split air conditioning system cost in Carshalton?
Guide prices in Carshalton run from about £1,850 to £3,795 per system, plus VAT. A typical job (two-room multi-split) costs £4,395–£7,595 plus VAT. We fix the price in writing after a free survey.
Do you also cover Wallington, Sutton and Mitcham?
Yes. Alongside Carshalton, we also cover Wallington, Sutton and Mitcham. Each has its own page with local guide prices.
Which postcodes do you cover in Carshalton?
All of them, including SM5. Give us your postcode when you enquire and we will confirm the visit details.
How long does it take to fit?
A single split is usually fitted in a day; a multi-split in one to two days.
Does a small split need F-gas leak checks?
It depends on the refrigerant charge and type. Many small R32 splits fall below the 5 tonnes CO2 equivalent threshold for mandatory leak checks, but they still need installing and servicing by F-gas certified engineers.
Need split and multi-split air conditioning in Carshalton?
Free survey and fixed written quote. We reply with a guide price or to book the survey.