Insulation & comfort
U-Value Calculator
Your measurements : depth / thickness, thermal conductivity, total surface resistance. Your estimate : thermal transmittance u, thermal resistance r.
How the calculation works
U-Value Calculator
U = 1 / (Depth / thickness / Thermal conductivity + Total surface resistance)Before you order
- This is a rough planning estimate. Choose the W/m³ assumption for your situation; climate, insulation, air leakage and glazing can change the load. A professional heat-loss or cooling-load calculation is needed for final equipment selection.
- Use the coverage, yield and dimensions printed on your product. Waste allowance is adjustable; real cuts and site conditions may change the order.
Worked example
- Depth / thickness
- 0.1 m
- Thermal conductivity
- 0.035 W/mK
- Total surface resistance
- 0.17 m2K/W
Thermal transmittance U 0.33 W/m2K
Thermal resistance R 3.03 m2K/W