Windows play a crucial role in reducing a building's heating consumption to the lowest level possible. Besides the window's basic energy performance, the primary factors to consider in low energy buildings are:
- The windows' orientation in relation to the sun
- Sun screening and shading
- The glass ratio
- Installation methods and thermal bridges
- The number of windows and total window area
- Air tightness
Further information can be found in the Good Energy brochure.
In simple terms, a window's U-value is the measurement given to the amount of heat allowed to escape through it (heat loss), or in other words, its ability to keep in heat.
Double glazing windows with low energy performance is standard with VELFAC energy efficient windows, but a wealth of additional options is also available.
Even if double glazed windows are most commonly used, VELFAC often supply triple glazed windows depending on the requirements for the energy performance.