Multi-split air conditioning across Dorset
In a house in Bournemouth with a usable loft, multi-split pipes can often run through it so the front stays clear. Twin and triple systems suit Bournemouth homes where bedrooms sit above the kitchen and one rear wall can take the outdoor unit. South West summers are milder on the coast, but sheltered towns and south-facing rooms still overheat, and efficient winter heating matters just as much.
Prices in Dorset
Guide prices around Dorset run from £2,450 to £7,750 for 2–4 rooms including VAT. That is close to the UK middle for this kind of work. Concealed pipework, access equipment for high walls and any electrical work are what push prices towards the upper figure. Typical Triple work (three rooms with mixed indoor styles and Wi-Fi control throughout) lands around £3,350–£5,450 in this area.
Twin
Two rooms on one outdoor unit, wall-mounted indoor units, standard routes.
Triple
Three rooms with mixed indoor styles and Wi-Fi control throughout.
Quad
Four or five rooms, longer concealed runs or a ducted unit in a loft void.
Guide prices show VAT at 20%. HMRC treats most fixed air conditioners and air-to-air heat pumps installed in homes as energy-saving materials, zero-rated until 31 March 2027 when we supply and fit them. If your installation qualifies, your quote shows 0% VAT and a lower price. Servicing, repairs, cleaning and controls are charged at 20%.
Planning and permissions
Since 29 May 2025, England's permitted development rules allow larger outdoor units (up to 1.5 m³) and no longer require a 1 m gap to the boundary, provided the MCS 020(a) noise check is met. Listed buildings and pitched-roof installs still need permission.
The survey
At the survey we look at how each room is used, where the sun hits it and how the pipes can reach the outside wall, then put it all in a written quote. On a survey in Dorset the engineer looks at room size, glazing, the route for pipes and drains, the electrics and where the outdoor unit can sit quietly, then the written quote follows.
What is included
Included with multi-split air conditioning across Dorset:
- An indoor unit and controls for every room
- Commissioning and a walk-round of every room's controls
- Free survey with a room-by-room heat-gain check
- Planned pipe routes through lofts, floors or trunking
- Pressure test, vacuum and refrigerant charge calculated for the pipe lengths
- One outdoor unit sized to the combined load
Towns in Dorset
Pick your town for local details, or see every service in Dorset.