HVAC Sizing Estimator

Rough BTU or ton estimate from square footage and climate.

Conditioned area (sq ft)

Climate factor (BTU/sqft) e.g. 30-45

Insulation / exposure factor (0.8-1.3)

Estimated BTU/h

63000

Tons (12k BTU = 1 ton)

5.3

Rule of thumb only. Manual J load calc recommended for proper sizing.