What's the formula for determining how may BTU's I need for an air conditioner?

Question

Looking to by an air conditioner and need to know how to determine what size AC I need.

Answer 1

Just determine the size of the room, most a/c units will say how big of a room they will cool.

Answer 2

An effective rule of thumb to determine the BTUs needed to cool a room is to multiply the square feet of the room by 25; add 1,000 for every window and 400 for each occupant.

Answer 3

Here is a web site that we have found useful:

http://www.goodhousekeeping.com/home/air...

Best wishes!