Wall-mounted air conditioning
Wall-mounted air conditioning installation in Surrey
The UK’s most popular way to cool and heat a single room: a slim indoor unit high on the wall, linked to a compact outdoor unit. Quick to install, quiet to run and efficient enough to use all year.
Get your free quote
Tell us what you need and we’ll get back to you, usually within 24 hours.
The basics
What is a wall-mounted air conditioner?
A wall-mounted air conditioner — sometimes called a high-wall split — is the indoor half of a split system. It draws in warm room air, passes it over a cold coil and sends cooled, filtered air back into the room. The heat it removes travels through insulated copper pipes to an outdoor unit, which releases it outside.
Reverse the cycle and the same unit becomes a heat pump, warming the room in winter. Domestic models typically range from about 2kW to 7kW of cooling, enough for anything from a box room to a large open-plan lounge.
Sizing guide
What size air conditioner does my room need?
As a starting point, match the cooling capacity to the floor area. We fine-tune this during the survey.
| Room size (floor area) | Typical room | Cooling capacity |
|---|---|---|
| Up to 15m² | Single bedroom, study | 2.0–2.5kW |
| 15–25m² | Double bedroom, home office | 2.5–3.5kW |
| 25–35m² | Living room, large bedroom | 3.5–5.0kW |
| 35–50m² | Open-plan kitchen-diner | 5.0–7.0kW |
Rooms with large glazed areas, south or west-facing windows, top-floor or loft positions, or lots of electronics may need the next size up.
Best uses
Where wall-mounted units work best
Bedrooms
Quiet sleep modes and directional louvres that keep airflow off the bed.
Living rooms
Often fitted above a TV or window, where the unit blends into the room.
Home and small offices
Steady, comfortable temperatures through long working days.
Extensions with big glazing
Counteracts solar gain from bi-fold doors and roof lanterns.
Treatment and meeting rooms
A cost-effective option for small commercial rooms.
Garden offices
One unit handles heating and cooling for the whole outbuilding.
Finishes
Designer and premium wall unit finishes
Wall units are no longer limited to plain white boxes. Matt black, mirror and textured finishes suit modern interiors.
Neat installs
How we hide the pipework and keep it tidy
A tidy installation is planned before the drill comes out. We look for the shortest, least visible route for the refrigerant pipes, cable and condensate drain.
- Back-to-back: the outdoor unit sits directly behind the indoor unit, so almost no pipework shows.
- Colour-matched trunking: where pipes must run along a wall, they’re enclosed in neat trunking.
- Internal routes: in renovations, pipes can run inside stud walls or ceiling voids before plastering.
Compare
Wall-mounted vs other types of air conditioning
Wall-mounted vs floor-mounted
Wall units distribute cool air better; floor consoles are better for heating and for rooms without a suitable high wall, such as loft rooms with sloping ceilings.
Wall-mounted vs ceiling cassette
A cassette needs a ceiling void and suits larger open spaces. For a single domestic room, a wall unit is simpler and cheaper to install.
Wall-mounted vs portable air conditioner
Portable units vent hot air through a window hose, are noisy and much less efficient. A fixed wall unit is quieter, cools faster and also heats.
One wall unit or a multi-split?
For one room, a single split. For two or more rooms, a multi-split can run several wall units from one outdoor unit.
Get in touch
Get a quote for a wall-mounted unit
Tell us the room size and which wall you have in mind — we’ll recommend the right capacity and give you a fixed price.