Multi-split air conditioning
Multi-split air conditioning installation in Surrey
Cool and heat several rooms from a single outdoor unit, with each room set to its own temperature. Ideal for bedrooms upstairs, a lounge and a home office — without a row of condensers on your wall.
Get your free quote
Tell us what you need and we’ll get back to you, usually within 24 hours.
Capacity
How many rooms can one multi-split outdoor unit serve?
Domestic multi-split outdoor units typically connect two, three, four or five indoor units. The outdoor unit is sized for the combined load of all rooms, taking into account that they rarely all need full output at the same time.
Each indoor unit has its own remote or app control, so the main bedroom can sit at 20°C overnight while the home office is switched off — and you only pay for the rooms you use.
- 2 to 5 rooms per outdoor unit
- Individual temperature in each room
- One condenser outside
- Cooling and heating
Mix and match
Mixing indoor unit styles on one system
Most manufacturers let you combine different indoor unit types on the same outdoor unit, so each room gets the style that suits it.
Compare
Multi-split vs several single split systems
| One multi-split | Separate single splits | |
|---|---|---|
| Outdoor units | One | One per room |
| Space needed outside | Minimal | More wall or ground space |
| Installation cost | Usually lower for 3+ rooms | Usually lower for 1–2 rooms |
| If the outdoor unit fails | All rooms affected | Only one room affected |
| Adding rooms later | Possible if capacity was planned | Simple — add another split |
For a deeper look at running one room versus several, see how split systems work.
Planning
Planning a multi-split installation
Finding the right spot for the outdoor unit
Because every room connects back to it, the condenser’s position decides how long the pipe runs are. A central, accessible position — often a side or rear wall — keeps runs short and efficient.
Routing pipework to each room
Pipes can run externally in trunking, through lofts and ceiling voids, or inside walls during a renovation. We plan routes room by room so the result is neat inside and out.
Thinking ahead
Planning a loft conversion or extension? We can size the outdoor unit with spare capacity and fit capped pipework, so adding a room later is straightforward.
Installations
Multi-split outdoor units in place
Can different rooms be on heating and cooling at the same time?
On standard domestic multi-splits, no — all indoor units run in the same mode, though each sets its own temperature. Larger commercial heat-recovery systems can heat and cool simultaneously.
Is a multi-split suitable for a flat or terrace?
Often it’s the best option, because space for outdoor units is limited. One condenser on a balcony, flat roof or rear wall can serve the whole home, subject to freeholder or planning consent.
How long does a multi-split installation take?
Two or three rooms usually take one to two days, depending on pipe routes and access.
Get in touch
Plan your multi-split system
Tell us how many rooms you’d like to include, and we’ll design a system with a fixed price.