£51.74 (inc. VAT) £43.12 (ex. VAT)

Be the first to review this product

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


Pricing a project? For the best deal call 01786 357252

2 working days

Safe & Secure Shopping
Need Expert Advice?

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
Besides price…
why else would you choose YARD?
  • Roof Windows is all we do – we love what we do
  • We’re nice to deal with
  • We get a kick out of helping our customers
  • We make sure we fully understand your project
  • So, we can offer you the best window options
  • We believe we’re exceptionally good at this
  • We’ll keep your tradesmen or installer happy
  • We always ask the right questions before you buy
  • If things go wrong – we take a pride in sorting

Trustpilot Human score    Trustpilot Stars    Trustpilot Logo