VELUX Low U-value kit for sun tunnels, ZTB

The U-value kit lowers the u-value in a standard sun tunnel installation. We see a trend on the markets where low u value is of great importance and in some instances a legal requirement. Therefore, we have insulated the trim ring and added an extra two layer pane. The kit lowers the u-value from 2.9 W/m2K to 1.8 W/m2K. It has a discrete design and is easy mounted on already installed sun tunnels.

• Easily enhance the energy efficiency of your sun tunnel by adding the low U-value kit solution that improves insulation.