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Thermal loss of building constructions
A certain heat amount leaks from a heated room through outside walls and windows. The value "U" is the rate of this thermal permeability (transmission): the lower is this value, the better is the thermal insulation of the building material. Until recently, the glasses were the weakest point of the thermal insulation. The older insulating glasses reached the "U" value of "U" 3,0 W/m2K in the best case, with a single glazing even just "U" 5,8 W/m2K. With using the insulating glasses of new generation, the thermal loss is radically reduced. The new thermal-insulation standard is between the "U" values of 1,4 to 1,1 W/m2K. Thus, it is by more than a half lower as compared to the traditional insulating glasses and the glass is not more a material, which causes the highest thermal loss. On the contrary - just the glass saves the most power. We can imagine the value of the thermal insulation of new generation's insulating glasses as a 30 cm thick brick wall. The new "warm" glasses also avoid water-steam condensation on the inside surface of an insulating double-glass.Thermal loss of original glazing
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Family house: - inside space 9,1 %, - roof 12,5 %, - floor 12,8 %, - outside wall 14 %, - window 31,6 %. |
Block of flats: - inside space 10 %, - roof 12,5 %, - floor 9,4 %, - outside wall 14 %, - window 31,6 %. |
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