650 square feet
Standard practice holds that it takes 5000 BTUs to heat a room 100 to 150 sq ft Figure on adding another 1000 BTUs for every 50 or so sq ft added. Hence , 400 to 450 sq ft would need about 10,000 BTUs
150 ft^2
sorry
At least 8000 btu
24,000 btu's
15 x 10 = 150 (sq ft).
600 BTU/ ft is what i have been told.
18,000-21,000 BTU's
15 feet by 10 feet is 150 square feet.
36000 Btu
One Small room "144 Sq ft"