Check with the sales people in the store for your area and climate. I would say a 10 or 12,000 btu would do it, if you are only going to buy 1 unit.
In a typical residential application, your space is probably divided into different rooms. In that case, it is difficult to get cool air from one room to another. In that situation you would want multiple air conditioners. They usually do not come in a size less than 5,000 btu's per hour. So, to achieve enough total cooling, you will probably want two or more small air conditioners, one in the living room and one in each bedroom.
12000 BTU
sorry
24,000 btu's
600 BTU/ ft is what i have been told.
18,000-21,000 BTU's
36000 Btu
420. Get 450 to be safe.
450 sq ft = 64,800 sq inches.
2500sq ft in northern climate
450 sq. ft.
About 18000 BTUH. Rule of thumb is 400 sq ft / ton, 1 ton = 12000 BTUH.
14000BTU
60000