An air conditioner that's too small runs forever, too big short-cycles and wastes energy. Get a room-based BTU and tonnage estimate that factors in size, sun, people, and climate.
Starts from 25 BTU per square foot and adjusts for sun, people, ceiling height, and climate.
East/west sun, kitchen heat, and occupancy all change the number — the calculator accounts for them.
Maps your number to the nearest standard window/wall unit so you know what to order.
All calculations run locally in your browser.
Get every room comfortable.