Solar protection with VELFAC 200 DGU
Utilizing the free solar energy from the sun is necessary in low energy buildings to achieve the required energy performance.
However, too much of the sun’s heat is not always positive, especially on elevations oriented directly towards the sun, this can lead to overheating of a building making it uncomfortable for the occupants.
VELFAC offers various solar control glazing options which can regulate the intake of solar heating.
Additional options for solar heating control is the provision of internal doors, blinds, curtains etc.
Energy values for often used SUN glazing, VELFAC 200 DGU
There are various types of solar control glazing:
VELFAC Sun SKN176 has a neutral colour coating, which is very close to the appearance of standard glass, and delivers a natural internal finish and a clear view of the external environment.
The other glazings have a coating, which is a little darker in colour and therefore offer greater protection against unwanted solar gain. Although the coating remains very transparent, the colours of the external view will be slightly affected.
Definition of energy values
The illustration shows the definition of common energy terminology.
Direction of the arrows indicates whether the heat coming from the outside and closed in, or whether it comes from within and escape.