Performance Data

Definitions:

Typical Window Energy Rating: represents how windows with different glazing types would perform with most leading profiles.

Thermal Insulation: A measure of the rate of heat loss of a typical PVC-u window (W/m²K). A principle reason for buying energy efficient window, the lower the u-value the better the window is at retaining heat.

Effect on virtually eliminating internal condensation: a combination of high performance glass and a warm edge spacer bar ensures virtual elimination of internal condensation.

Optimum solar heat gain: an optimum amount (70-75%) of the sun’s energy passing through the window into the room is important in order to benefit from this free energy source, but without the room overheating in the summer. Works best when coupled with a good thermal insulating glass to keep the heat in the room.