Conduction Through a Wall
Steady-state conduction through a plane wall: Q = k·A·ΔT / L. The U·A building block for every insulation calculation.
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Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| Thermal conductivity | W/(m·K) | |
| Heat-transfer area | m² | |
| Wall thickness | m | |
| Temperature difference | K | |
| Heat flow | kW |
Source: Incropera - Fundamentals of Heat and Mass Transfer
In short
Steady-state conduction through a plane wall: Q = k\u00b7A\u00b7\u0394T / L.