1800 btus
1 mile = 5280 ft so 18000 ft = 3.409091 miles.
18000 sq ft = 0.41322 acres
According to the Energy Star chart, 12,000 BTUs will cool a room of 450 up to 550 square feet. I'd stay on the low end of that.
Around a million. plus or minus a few.
12,000
up to 500 sq.ft.
1800 btus
1 mile = 5280 ft so 18000 ft = 3.409091 miles.
18000 sq ft = 0.41322 acres
According to the Energy Star chart, 12,000 BTUs will cool a room of 450 up to 550 square feet. I'd stay on the low end of that.
80000
The rule of thumb is 2-1/2 tons per 1000 square feet. It is not measured in BTU which is a heating term
120 ft * 150 ft = 18000 sq ft = 0.413 acres (to 3 dp)
Around a million. plus or minus a few.
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
[sqrt(18000 ft2) * (1 m / 3.28084 ft)]2 = 1672.25 m2