Ducted air conditioning in Carmarthen
South Wales summers can be warm and humid, and winters damp, so a reversible system earns its keep all year. Ducted systems suit Carmarthen loft conversions and new extensions where ceilings are being boarded anyway.
For a renovation in Carmarthen, the best time to plan ducted cooling is before the plasterers arrive. As well as Carmarthen itself, our Dyfed coverage takes in Llanelli, Ammanford and the towns around them. Homes in SA31 are all within our coverage.
Prices in Carmarthen
For Carmarthen, expect roughly £4,995 to £13,745 per system, VAT included, adjusted for typical South and Mid Wales rates. Labour rates in South and Mid Wales keep this slightly under the national middle. Quotes move with the length of the pipe run, where the outdoor unit can sit and how much electrical work the job needs. For reference, the Zoned option in Carmarthen (motorised dampers or two units for separate floors or room groups) usually comes to about £6,845–£10,045.
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 1 June 2026, Welsh permitted development rules for outdoor units closely match England's: up to 1.5 m³, two units on a detached home, one on other homes, and MCS 020a noise compliance. Listed buildings need consent, and conservation areas have extra restrictions on units facing a road.
The survey
Surveys in Carmarthen cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. A survey in Carmarthen usually takes one to two hours. We measure the rooms, check the walls and the consumer unit, agree the outdoor unit position with you and photograph the pipe routes.
What is included
Here is what is included on every job in Carmarthen:
- Access hatch and condensate route planned in
- Commissioning with airflow balancing per grille
- Free survey with ceiling-void and loft inspection
- Wall controller or app control
- Insulated ductwork, plenums and grilles
Nearby
Close to Carmarthen, our coverage also includes Llanelli (13 miles), Ammanford (14 miles) and Gorseinon (17 miles). See all services in Carmarthen or ducted air conditioning across Dyfed.