£54.00 (inc. VAT) £45.00 (ex. VAT)

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Lower the U-Value of your standard Sun Tunnel with this great little kit by VELUX.

  • Lowers U-value from 2.9 W/m2K to 1.8 W/m2K
  • Discrete design that integrates perfectly into any home
  • Easily mounted on already installed sun tunnels


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Further Detail

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