Why size matters here
Glazing lets in far more heat than a solid wall. Add an oven, a hob and a family, and an open-plan kitchen needs considerably more cooling than a bedroom of the same floor area. A unit that’s too small runs flat out and never quite gets there, so the surveyor measures the glass as well as the room.
Types of indoor unit
- Wall-mounted. Needs a stretch of wall clear of cupboards, high up.
- Floor-standing. Sits low on a short wall, a good fit where wall cabinets fill the space above.
- Ceiling cassette. Recessed into the ceiling. Neat, but needs a void, so it suits extensions still being built.
Where things go
Keep the indoor unit away from the hob, as cooking fumes clog filters. The outdoor unit usually goes on a side return or at the back of the extension. Larger family rooms in places like Old Basing and Sherfield on Loddon sometimes use two indoor units on a multi-split to spread the cooling evenly.
Questions
Can I still open the bifolds?
Of course. The system idles or switches off while the doors are open, then cools the room again once they’re shut.
Does it help in winter?
Yes. Glass-heavy extensions can feel chilly, and the unit heats them efficiently.
Find out what your extension needs
Start the estimate, describe the room, and see a guide figure.