Heat load surveys and system design in Trowbridge
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. Every Trowbridge quote starts with a room-by-room survey rather than a guess from floor area.
No two rooms in Trowbridge gain or lose heat in quite the same way, which is exactly why rooms are measured before sizing. Trowbridge sits around 25 miles from Swindon, inside our Wiltshire area. Coverage includes BA14.
Prices in Trowbridge
Budget around £395–£1,250 for a standalone design pack including VAT for heat load surveys and system design in and around Trowbridge. That is broadly in line with national guide prices. The design pack price depends mainly on the number of rooms and whether full drawings and equipment schedules are needed. For reference, the Design pack option in Trowbridge (drawings and schedules for one home) usually comes to about £395–£795.
Home survey
Free with an installation quote.
Design pack
Drawings and schedules for one home.
Self-build pack
Whole-house design for a new build.
Planning and permissions
In England, most houses can have an outdoor unit under permitted development if it is no larger than 1.5 m³, meets the MCS 020(a) noise limit of 37 dB(A) at the nearest neighbour's window, and there are no more than two on a detached house or one on other houses. Listed buildings need consent.
The survey
A survey in Trowbridge 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. 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.
What is included
Here is what is included on every job in Trowbridge:
- Room-by-room heat gain and heat loss
- Electrical load for your electrician
- Pipe and drain routes
- Written proposal with options
- Equipment selection and outdoor unit sizing
Nearby
Nearby, we also cover Bath (8 miles), Frome (8 miles) and Warminster (8 miles). See all services in Trowbridge or heat load surveys and system design across Wiltshire.

