To cool this area	Look for this size air conditioner
100 to 150 square feet	5,000 BTUs
150 to 250 square feet	6,000 BTUs
250 to 300 square feet	7,000 BTUs
300 to 350 square feet	8,000 BTUs
350 to 400 square feet	9,000 BTUs
400 to 450 square feet	10,000 BTUs
450 to 550 square feet	12,000 BTUs
550 to 700 square feet	14,000 BTUs
700 to 1,000 square feet	18,000 BTUs
1,000 to 1 400 square feet	24,000 BTUs