The lower the U-Value the better, right? With the ZTB Low U-Value Kit, you can lower the u-value of your standard VELUX Sun Tunnel!
This great little kit lowers the u-value in a standard sun tunnel installation. It is becoming increasing important to have a low u-value and in some instances a legal requirement.
Features & Benefits:
- Lowers the u-value from the standard 2.9 W/m2K to 1.8 W/m2K
- Features an insulated trim ring and an extra two-layer pane.
- Easy to install as it is easily mounted on already installed Sun Tunnels