Split and multi-split systems in Isleworth
A free survey, a clear specification and a fixed price for split and multi-split air conditioning in Isleworth.
- 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 Isleworth?
In Isleworth, guide prices run from about £1,850 to £3,795 per system, plus VAT. A typical job (two-room multi-split) usually comes to £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.
Covering Isleworth and nearby
Isleworth sits within London's dense commercial fabric: shopfronts, offices above, studios and venues, where outdoor unit positions and access need careful planning.
That includes premises in TW7 and the surrounding districts. We also cover Hounslow, Heston and Richmond, all within easy reach of Isleworth. We plan installations in Isleworth so the noisy work — core drilling, ceiling access, lifting plant — happens when it disturbs your business least.
Included as standard
- Survey and unit sizing
- Wall-mounted, floor-standing or under-ceiling indoor units
- Outdoor unit on wall brackets, a flat roof frame or ground mounts
- Condensate drainage
- Commissioning, remote or wired controls and F-gas records
Guide prices in Isleworth
Guide prices for Isleworth, set for London. Your fixed price comes in writing.
| 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 it works in Isleworth
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 Isleworth screened and tidy at the end of each day.
Test and commission
Pressure test, evacuation, any extra refrigerant charge, then commissioning and handover.
Points to plan for in Isleworth
Outdoor unit position
Outdoor units need air flow and access, and should be away from neighbours' windows to keep noise down.
Leased premises
If your Isleworth 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.
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.
Conservation areas
Historic streets and listed buildings in and around Isleworth are more likely to need planning permission for outdoor units on visible elevations. We check with the local planning authority before work is booked.
Types of premises we cover in Isleworth
- Retail and shops: comfortable shop floors, stockrooms and entrances, even with the door open.
- Healthcare and dental: clean, quiet cooling for surgeries, clinics, dental practices and care settings.
- Pubs and bars: cooling for busy bars, function rooms and cellars, sited with neighbours in mind.
- Warehouses and industrial: cooling for offices, mezzanines, control rooms and temperature-sensitive areas.
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.
FAQs for Isleworth
How much does a split air conditioning system cost in Isleworth?
Guide prices in Isleworth 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 Hounslow, Heston and Richmond?
Yes. Alongside Isleworth, we also cover Hounslow, Heston and Richmond. Each has its own page with local guide prices.
Which postcodes do you cover in Isleworth?
All of them, including TW7. Give us your postcode when you enquire and we will confirm the visit details.
Single split or multi-split?
Separate singles are more resilient and can be cheaper for two rooms; a multi-split saves outdoor space. We price both where it is close.
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.
Talk to us about your premises in Isleworth
Free survey and fixed written quote. We reply with a guide price or to book the survey.