What size air conditioner do I need?
How to work out the BTU capacity your room actually needs, and why guessing costs you money in both directions.
Guides
Air conditioning, explained properly
Straight answers to the questions we get asked most, written by the people who manufacture and service the units rather than by a copywriter.
All guides
Why is my air conditioner not cooling?
The real causes, in the order a technician checks them — and the two things you can safely check yourself before calling anyone.
Why is my air conditioner leaking water?
Water dripping from the indoor unit is almost always drainage, not refrigerant. What causes it, and what you can do before it damages your wall.