Air conditioning guides

The honest answer most installers won't give you up front. Here's what home air conditioning really costs in the UK, what drives the price, and why two quotes for the same house can be thousands of pounds apart.

Set it right and your air conditioning will keep the whole summer comfortable for pennies an hour. Set it wrong and you'll chase the temperature up and down all day. Here's how to get it right.

Every modern split system is an air-source heat pump, which means the unit on your wall is also one of the cheapest ways to heat a room. Here's how to use it properly when the temperature drops.

Multi-split systems run several rooms from one outdoor unit, which keeps costs down and outside walls tidy. The one thing they can't do is heat one room while cooling another. Here's why, and why it almost never matters in a home.

For most houses, no. Domestic air conditioning usually falls under permitted development. But there are exceptions worth knowing before any installer drills a hole in your wall.