Thermally insulating double glazing

Thermal insulating glass is a highly rated new generation of insulating double glazing that meets the high requirements of effective thermal insulation.
A special feature is the layer of noble metal on the surface of the glass in the interspace.
It is a neutral and invisible layer that reflects heat back into the room.
To improve the thermal insulation properties, the interspace is filled with a low thermal conductivity gas, argon or argon gas.
krypton

*Note: filled with argon 90%.
All data are nominal.
A certain amount of heat is always lost from the heated room through the perimeter walls and windows.
The measure of this thermal transmittance is the so-called “U” value: the smaller the value, the better the thermal insulation of the building material.
Until recently, glass was the weak point of thermal insulation.
Older insulating glass had a “U” value of only 3.0 W/m2K, even as low as 5.8 W/m2K with single glazing.
The new thermal insulation standard is between 1.4 and 1.1 W/m2K.
Glass is thus no longer the material that causes the greatest heat loss.
On the contrary, glass saves the most energy.
The thermal insulation value of this glass is equivalent to a 30 cm brick wall.
Insulating glass has a great contribution to prevent water vapour condensation on the inside of double glazing. The ‘g’ value: The glass uses the sun’s heat.
Glass is the only building material that has this property.
It follows that the sun partially heats the glazed spaces.
The measure of this effect is the ‘g’ value.
What is welcome in winter can have unpleasant consequences in summer.
The energy gain from solar radiation means overheating of the interior.
Therefore, high thermal insulation together with a moderate ‘g’ value is the right way to achieve thermal balance in most cases.
The difference between heat loss and gain must be as balanced as possible.
This fact has been taken into account in the dimensioning of our glasses.