Thermal transmittance calculation
Product
Type of window
Frame material
Single tilt and turn window Basis: EN 14351-1:2006
NATURE 3 Wood – spruce (Picea abies (L.) Karst)
Calculation norm: EN 10077-2:2012 (Calculation of thermal transmittance – Numerical method for frames) Detail used in calculation:
Thermal transmittance of a frame
Uf = 1,2 W/m2K, bf = 122 mm Uf,sp = 1,3 W/m2K, bf = 137 mm
Thermal transmittance of a glazing
Ug = 0,7 W/m2K, (6/12Ar/4/12Ar/6)
Specific thermal transmittance of a spacer
Ψ = 0,048 W/mK, TGI spacer
Window dimension (w x h)
1230 mm × 1480 mm
Validity: The data and results refer solely to the described specimen or to the specimen of bigger dimension but with the same frame and glazing details.
Window thermal transmittance:
Uw = 0,99 W/m2K
M SORA, 1.5.2014
Calculations made by:
dr. Aleš Ugovšek