VELUX ZTD 022 4000 Sun Tunnel SunCurve for 22" TGC/TCC Commercial Sun Tunnels

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The VELUX ZTD 022 4000 is the SunCurve accessory. It is designed to fit any 22" TGC/TCC commercial VELUX sun tunnel. The SunCurve improves light quality and boosts light output in the early morning and late afternoon.


  • Designed to be installed with VELUX TGC 022/TCC 022 Sun Tunnels


  • Size: 22"


VELUX provides a wide-range of warranties for their line of sun tunnels. Depending on the product purchased, the following warranties may apply:

  • 20 Year VELUX Sun Tunnel Skylight Rigid Tunnel Limited Warranty
  • 10 Year VELUX Skylights and Sun Tunnel Skylights Limited Warranty
  • 5 Year VELUX Polycarbonate Clarity Limited Warranty
  • 5 Year VELUX Acrylic and Polycarbonate Skylights Limited Warranty (for Metro-lite and Dura-lite)

These warranties only apply if the product is finished, installed, operated and maintained strictly in accordance with VELUX instructions or other instructions furnished with the Covered Product. ImproveDepot recommends a professional installation by a CERTIFIED INSTALLER to ensure that the product is protected by these warranties.

Normal wear and tear is not covered by VELUX's warranties, nor are problems arising from failure to properly maintain the product. Other restrictions apply, so be sure to read the included warranty information packaged with the product.

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