BTU by square footage

Cooling BTU, tonnage, and furnace size for common home sizes. Pick a size, or run your exact home through the calculator.

250 sq ft

5,000 BTU · 0.4 ton

Furnace ≈ 11,000 BTU

500 sq ft

10,000 BTU · 0.8 ton

Furnace ≈ 21,000 BTU

750 sq ft

18,000 BTU · 1.5 ton

Furnace ≈ 32,000 BTU

1,000 sq ft

24,000 BTU · 2 ton

Furnace ≈ 42,000 BTU

1,200 sq ft

24,000 BTU · 2 ton

Furnace ≈ 50,000 BTU

1,500 sq ft

30,000 BTU · 2.5 ton

Furnace ≈ 63,000 BTU

1,800 sq ft

36,000 BTU · 3 ton

Furnace ≈ 76,000 BTU

2,000 sq ft

42,000 BTU · 3.5 ton

Furnace ≈ 84,000 BTU

2,200 sq ft

48,000 BTU · 4 ton

Furnace ≈ 92,000 BTU

2,500 sq ft

60,000 BTU · 5 ton

Furnace ≈ 105,000 BTU

3,000 sq ft

60,000 BTU · 5 ton

Furnace ≈ 126,000 BTU