Heat Pump Sizing for 364 m² (3,918 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 Pump11.4 kW38,898 BTU/h (3.24 Tons)
Annual Electricity Usage3,699 kWh/yrDelivers 16,275 kWh Heat (SCOP 4.4)
Savings vs Direct Electric12,576 kWh/yrSpecific Load: 29.8 W/m²
Electrical Circuit (230V)20 A BreakerPeak Compressor Input: 3.17 kW
Thermal & Electrical Specification Table (364 m² / 3,918 sq ft)
| Heated Floor Area | 364 m² (3,918 sq ft) |
| Climate Zone & Design Outdoor Temp | US Sunbelt & Mediterranean (TX/FL/CA/ES/IT) |
| Building Insulation Envelope | Modern / New Build Insulation (35 W/m² Base) (29.8 W/m² Peak) |
| Peak Space Heating Load | 10.85 kW Thermal |
| Recommended Heat Pump Output (Incl. DHW) | 11.4 kW (38,898 BTU/h · 3.24 Tons) |
| Seasonal Coefficient of Performance (SCOP) | 4.4 (340%–450% Seasonal Efficiency) |
| Annual Heat Demand vs Electricity Consumed | 16,275 kWh Heat → 3,699 kWh Electricity |
Frequently Asked Questions
What kW size heat pump do I need for a 364 m² (3918 sq ft) house?
For a 364 m² (3918 sq ft) building with Modern / New Build Insulation (35 W/m² Base) in US Sunbelt & Mediterranean (TX/FL/CA/ES/IT), the peak space heating load is 10.85 kW (29.8 W/m²). Including domestic hot water allowance, a 11.4 kW (38,898 BTU/h / 3.24 Ton) heat pump is recommended.
How many kWh of electricity does a 11.4 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 3,699 kWh of electricity per year to deliver 16,275 kWh of heat — saving 12,576 kWh/year compared to direct electric radiators.
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