Example: Home area: 1,800 sq ft · Climate: Mixed · Insulation: Average → Heat pump size: 4.5 tons.
Capacity: 54,000 BTU/hr
Cold-climate note: Standard models fine
Frequently asked questions
How do I calculate heat pump size? Enter your numbers above and the result updates instantly. For example: Home area: 1,800 sq ft · Climate: Mixed · Insulation: Average → Heat pump size: 4.5 tons.
Is this Heat Pump Size Calculator free? Yes — completely free with no sign-up or paywall. It runs entirely in your browser and keeps working offline; the numbers you enter never leave your device.
How accurate is it? It uses the standard published formula for heat pump size. Results are estimates for planning — not financial, tax, medical, engineering, or legal advice.