The capacity of a heat pump is measured in “tons of refrigeration,” with one ton equaling 12,000 Btu. A two-ton heat pump has a cooling capacity of 24,000 Btu. The heating capacity will be in the 24,000 Btu region, but it’s crucial to remember that a unit’s name-plate capacity solely pertains to cooling..
| Home size | size (in tons) | size (in BTUs) |
|---|---|---|
| 500 square feet | 1 ton | 12,000 BTUs |
| 1,000 square feet | 2 tons | 24,000 BTUs |
| 1,500 square feet | 3 tons | 36,000 BTUs |
| 2,000 square feet | 4 tons | 48,000 BTUs |
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