VELUX ZZZ 234 C06 Instant Light Shaft, 21-1/2" W x 46-1/4" H Skylight Outside Frame Size

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The Velux ZZZ 234 C06 is an instant light shaft. For easy assembly, this model comes pre-cut to size. It is designed to be used with VSS, VSE, VS, FS, and FSR skylights with an outside frame size of 21-1/2" W x 46-1/4" H. With this kit there is no need to drywall spackling, sanding, and painting. The Velux ZZZ 234 C06 features a 16" standard depth and is intended to eliminate the time and cost normally associated with a traditional light shaft construction made from drywall.

Note: Image shows the style of this order. This model has the size of 21" W x 46-1/4" H.


  • No drywall, spackling, sanding and painting needed
  • Works on all "box" type light shafts (Not flared)
  • 16" standard depth (trim to actual on site)
  • All others pieces are pre-cut to size to be site assembled
  • 4" minimum spacing required around all sides if multiple skylights are installed


  • Shaft Depth: 16"
  • Skylight Rough Opening/Finished Frame Size: 21" W x 45-3/4" H
  • Skylight Outside Frame Size: 21-1/2" W x 46-1/4" H
  • Compatible Skylights: VSS, VSE, VS, FS, and FSR


5 year limited warranty through manufacturer

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