Heat Gain Calculator
Calculate heat gain in buildings and spaces. Determine cooling requirements based on insulation, windows, occupancy, equipment, and environmental factors.
Step 1: Space & Building
Understanding Insulation
Higher R-values indicate better insulation performance. Better insulation reduces heat transfer, lowering cooling requirements and energy costs.
Step 2: Heat Sources & Climate
About Heat Gain Sources
Heat gain comes from conduction through walls/roof, solar radiation through windows, occupants, lighting, and equipment. Each contributes to the total cooling load.
Heat Gain Analysis Results
Total Heat Gain
Insulation Level Comparison
| Insulation Level | R-Value | Heat Gain (BTU/h) | Cooling Tons |
|---|
Heat Gain by Source
Heat Gain Formula
Total Heat Gain = Conduction + Solar + Internal Heat
Conduction heat gain through walls/roof: Area × ΔT × U-value
Solar heat gain through windows: Window Area × SHGC × Solar Factor
Internal heat: Occupants + Equipment + Lighting
Need Professional HVAC Design Analysis?
Connect with our HVAC experts for detailed heat load calculations, system sizing recommendations, and energy efficiency analysis for your building project.
Get Professional Analysis