Science & Environment
Building Envelope Heat Loss Calculator
Calculate conductive heat loss through a building envelope element using U-value, area and temperature difference.
Your inputs
Change any value to update the result instantly.
Heat loss rate
600 W
Heat loss
0.6 kW
Daily energy loss (24 hr)
14.4 kWh/day
U-value used
0.3 W/(m²·K)
Formula and working
Q = U × A × ΔT
- 1
Collect the inputs
U-value = 0.3 W/(m²·K); Surface area = 100 m²; Indoor-outdoor temperature difference = 20 K
- 2
Apply the formula
Q = U × A × ΔT
- 3
Result
Heat loss rate = 600 W
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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