Help & guides
The bits worth understanding before you buy
No sales pages. These are the four questions our engineers get asked on almost every survey, answered properly.
4 min read
Sizing air conditioning to a room
How we translate floor area, glazing and use into a kW figure — and why the biggest unit on the shelf is rarely the right one.
Read guide →4 min read
Single split or multi-split?
One outdoor unit per room, or one outdoor unit serving several. The trade-offs in cost, wall space, control and repair.
Read guide →3 min read
0% VAT on air conditioning, explained
Which residential supply-and-fit jobs qualify for the zero rate, which do not, and what happens at 20%.
Read guide →4 min read
What air conditioning costs to run
How to work out a realistic hourly cost from the kW and SEER on the label, for cooling in summer and heating in winter.
Read guide →