Heat load surveys and system design across Dyfed
Every Carmarthen quote starts with a room-by-room survey rather than a guess from floor area. For self-builds and extensions in Carmarthen, a standalone design pack can go straight to your builder. Humid summer spells in South Wales make dehumidifying and cooling equally welcome.
Prices in Dyfed
Guide prices around Dyfed run from £365 to £1,145 for a standalone design pack including VAT. That sits a little below the UK middle, reflecting typical South and Mid Wales labour rates. The design pack price depends mainly on the number of rooms and whether full drawings and equipment schedules are needed. Typical Design pack work (drawings and schedules for one home) lands around £365–£745 in this area.
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 Wales, outdoor units of up to 1.5 m³ that meet MCS 020a noise limits are usually permitted development on houses; listed buildings need consent, and in conservation areas a unit cannot go on a wall or roof facing a road.
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. 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
Included with heat load surveys and system design across Dyfed:
- Room-by-room heat gain and heat loss
- Equipment selection and outdoor unit sizing
- Noise check to the nearest neighbour
- Pipe and drain routes
- Written proposal with options
- Electrical load for your electrician
Towns in Dyfed
Pick your town for local details, or see every service in Dyfed.

