What is a 'Warm Edge'?

At the edge bonds of a double glazing unit, a 'gap' is created between the double glazing panes with the help of spacers.  This creates a space filled with inert gas or air between the glass panes, a key factor for the insulating efficiency of the glazing.  The spacers create a linear thermal bridge of considerable length within the window component.  When metal profiles are used, thermal heat is more or less released into the atmosphere - along the entire transition area between glass and window frame.

This loss is not only reflected in a building's energy balance, but also leads to a cooling of the inside surface temperature along the glass edge - ie. the edge becomes cold.  If the surface temperature sinks below the dew point temperature of the surrounding air, condensation will develop - a comfort and hygiene flaw.  Apart from the health risks posed to residents, long-term condensation can also cause damage to the window frame.

Energy saving

To lower heating costs through better insulation we use the thermally improved spacer SGG SWISSPACER V which excels with an optimised heat transfer resistance.  The heat transmission coefficient is at least 0.1W/m2K lower than that of conventional aluminium spacer bars.  Reductions of up to 0.3 W/m2K can be attained. 

The result using the high tech spacer bar SGG SWISSPACER V enables heating costs to be reduced by up to 5%.  That's easy on the wallet, and with reduced CO2 emissions, also on the environment.

Comfort

Due to the superior isolation characteristics of SGG SWISSPACER V, higher temperatures are maintained at the edges of glass panes - significantly reducing the risk of condensation forming.  This, in turn, reduces the build-up of harmful mould and mildew on the window.  Higher temperatures at the edge of the pane also mean less cold radiation, ensuring more comfort inside and a healthy indoor climate.