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
Full calculator →HVAC / AC Size Calculator
Floor Area (m²)
Ceiling Height (m)
Climate
Window Heat Loss
Full calculator →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
Area (m²)
1.80
Heat Loss (W)
100.8
Annual Cost (est.)
$65.32
Annual Heating Energy (kWh)
435.5 kWh
Key Differences
| Feature | BTU Calculator | Window Heat Loss |
|---|---|---|
| Category | practical | practical |
| Full Page | BTU Calculator | Window Heat Loss |