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Windows with old double glazing are technically outdated


THE PERFORMANCE OF MODERN WINDOWS

Compared to old double glazing, new modern windows have a thermal conductivity coefficient over 50% better, even suitable for a passive building. Even more when compared to old single glazing.

Calculation example:     
1982 school building with old double glazing and a building shell area of 2000 m2,
approx. 365 m2 window area.    
* Transmission: The transfer of heat out of or into a building.

 

Energy saved after full renovation of the building

Example calculation: With approx. 365 m2 window area, per year (avge. school building):
  old
U-value
before
renovation
after
renovation
new
U-value
Saving**  
Roof 0,35 1764 ltr 1260 ltr 0,25 504 ltr
(7 %)
Doors 3,5 441 ltr 277 ltr 2,2 164 ltr
(2 %)
Windows 2,9 8891 ltr 3066 ltr 1,0 5825 ltr
(79 %)
Wall 0,6 2117 ltr 1235 ltr 0,35 882 ltr
(12 %)
Ground slap 0,5 1512 ltr 1512 ltr 0,5 -  
=heating oil   14725 ltr 7350 ltr   7375 ltr (100%)
Optimal planning reliability, with sound insulation, thermal insulation and security from GAYKO