Heat Pump Sizing for 404 m² (4,349 sq ft) — US Sunbelt & Mediterranean (TX/FL/CA/ES/IT)
Thermal heat loss calculation, recommended heat pump capacity (kW, BTU/h & HVAC Tons), SCOP efficiency, and annual electricity consumption.
Recommended Heat Pump29.8 kW101,682 BTU/h (8.47 Tons)
Annual Electricity Usage9,944 kWh/yrDelivers 43,755 kWh Heat (SCOP 4.4)
Savings vs Direct Electric33,811 kWh/yrSpecific Load: 72.2 W/m²
Electrical Circuit (230V)45 A BreakerPeak Compressor Input: 8.28 kW
Thermal & Electrical Specification Table (404 m² / 4,349 sq ft)
| Heated Floor Area | 404 m² (4,349 sq ft) |
| Climate Zone & Design Outdoor Temp | US Sunbelt & Mediterranean (TX/FL/CA/ES/IT) |
| Building Insulation Envelope | Older Uninsulated Building (85 W/m² Base) (72.2 W/m² Peak) |
| Peak Space Heating Load | 29.17 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 29.8 kW (101,682 BTU/h · 8.47 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 4.4 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 43,755 kWh Heat → 9,944 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 404 m² (4349 sq ft) house?
For a 404 m² (4349 sq ft) building with Older Uninsulated Building (85 W/m² Base) in US Sunbelt & Mediterranean (TX/FL/CA/ES/IT), the peak space heating load is 29.17 kW (72.2 W/m²). Including domestic hot water allowance, a 29.8 kW (101,682 BTU/h / 8.47 Ton) heat pump is recommended.
How many kWh of electricity does a 29.8 kW heat pump use per year?
With a Seasonal Coefficient of Performance (SCOP) of 4.4 over 1500 full-load equivalent heating hours, the heat pump consumes approximately 9,944 kWh of electricity per year to deliver 43,755 kWh of heat — saving 33,811 kWh/year compared to direct electric radiators.
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