Ducted air conditioning across Devon
Ducted systems suit Plymouth loft conversions and new extensions where ceilings are being boarded anyway. For a renovation in Plymouth, the best time to plan ducted cooling is before the plasterers arrive. Damp South West winters make the dehumidifying side of a heat pump almost as useful as its cooling.
Prices in Devon
In South West England, our guide range for ducted air conditioning is £5,450–£14,950 per system, including VAT. That is broadly in line with national guide prices. The biggest variables are the pipe route, access for the outdoor unit and the state of the consumer unit, all of which the survey settles. Typical Zoned work (motorised dampers or two units for separate floors or room groups) lands around £7,450–£10,950 in this area.
Single zone
One ducted unit serving two or three rooms from a loft or void.
Zoned
Motorised dampers or two units for separate floors or room groups.
Whole home
Multiple ducted units with linear slot diffusers and smart control.
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
The free survey is where the real price is set: room measurements, pipe and drain routes, electrical checks and the outdoor unit position, all written into your quote. We book surveys in Devon at a time that suits you, including early evenings by arrangement, and send the written quote afterwards.
What is included
Included with ducted air conditioning across Devon:
- Insulated ductwork, plenums and grilles
- Concealed fan unit and outdoor unit sized to the zone
- Commissioning with airflow balancing per grille
- Access hatch and condensate route planned in
- Free survey with ceiling-void and loft inspection
- Wall controller or app control
Towns in Devon
Pick your town for local details, or see every service in Devon.