2 ton (24,000 BTU) 2 2 10 7 6 3 67 44 38 19 5 3 ton (36,000 BTU) 3 3 15 10 8 4 100 67 58 29 7.5 4 ton (48,000 BTU) 4 4 20 13 11 6 117 78 67 34 10 5 ton (60,000 BTU) 5 5 25 16 14 7 145 97 84 42 12.5 7.5 ton (85,000 BTU) 7.5 7.5 37 24 21 11 219 146 126 63 17