Ducted air conditioning in Horsham
Summers in the South East are among the warmest in the country, so cooling often comes first, with efficient winter heating as a bonus. Ducted systems suit Horsham loft conversions and new extensions where ceilings are being boarded anyway.
In an older house in Horsham, the loft and any existing bulkheads decide whether a ducted layout will work. Our West Sussex coverage takes in Horsham, about 7 miles from Crawley. Postcode districts we cover here include RH12.
Prices in Horsham
For Horsham, expect roughly £6,645 to £18,245 per system, VAT included, adjusted for typical South East England rates. South East England is one of the dearer parts of the UK for trades, which shows in the range. 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 Horsham (motorised dampers or two units for separate floors or room groups) usually comes to about £9,095–£13,345.
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
Surveys in Horsham cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. On a survey in Horsham 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
What a job in Horsham covers:
- Concealed fan unit and outdoor unit sized to the zone
- Access hatch and condensate route planned in
- Wall controller or app control
- Commissioning with airflow balancing per grille
- Free survey with ceiling-void and loft inspection
Nearby
Neighbouring places we cover include Crawley (7 miles), Horley (11 miles) and Haywards Heath (11 miles). See all services in Horsham or ducted air conditioning across West Sussex.