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HVAC Sizing vs Window Heat Loss — Home Efficiency

Compare HVAC capacity requirements and window heat loss. Understand how insulation affects your heating and cooling needs.

BTU Calculator

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HVAC / AC Size Calculator

Floor Area (m²)
Ceiling Height (m)
Climate

Window Heat Loss

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Window Heat Loss Calculator

Window Width (m)
Window Height (m)
U-value (W/m²·K)
Temperature Diff ΔT (°C)
U-value: Single glazing ≈ 5.7 · Double ≈ 2.8 · Triple ≈ 0.8

Heat Loss

Areal (m²)
1.80
Heat Loss (W)
100.8
Annual Cost (est.)
$65.32
Annual Heating Energy (kWh)
435.5 kWh

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