1350 square feet requires about 24,000 BTUs for cooling. A space this large will need more than one unit if you are using window units for cooling.
30 ft * 45 ft = 1350 sq. ft Ans) 1350 sq. ft
24,000 btu's
600 BTU/ ft is what i have been told.
18,000-21,000 BTU's
36000 Btu
9 sq ft = 1 sq yard so 1350 sq ft = 1350/9 sq yards = 150 sq yards.
2500sq ft in northern climate
14000BTU
60000
30' x 12'
700 to 1000
Alaska 200k btu fla 50k where you at?