What are SUN TUNNEL Skylights?

A VELUX SUN TUNNEL Skylight is a device that delivers sunlight from the roof into a room that is otherwise dark or under-lit from lack of windows, windows that face a northerly direction, or are shadowed by trees or other buildings. VELUX SUN TUNNEL Skylights make it possible to light these dark spaces during the day without using electricity.

The Dome:
Installed on the roof, the VELUX SUN TUNNEL dome is made of durable acrylic. It is designed to collect as much light as possible from the sky and transmit it into the tube. The dome is fastened to the flashing with metal screws to withstand the elements.

The Flashing:
The VELUX SUN TUNNEL comes with a seamless, one-piece metal flashing for a waterproof roof seal.

The Tube:
The VELUX SUN TUNNEL Rigid Tube is made of highly reflective silver coated aluminum; it is 98% reflective. The tube can be installed straight down from roof to ceiling, or, by using adjustable elbow sections, it can be angled to accommodate obstacles or to place the dome in the most effective location on the roof and still reach the desired location in the room. The tubes can extend as long as 20 feet from the roof to the ceiling.

 

The Diffuser:

The diffuser and trim ring assembly is installed in the ceiling and can accommodate either a flat or cathedral ceiling of any material. The diffuser is a disc made of dual glazed acrylic that retains heat inside your home in winter and keeps heat out in summer. It comes in three styles: Frosted (standard), Fresnel, or Prismatic. There is also the option of the Decorative diffuser, which looks much like a dome light fixture. 

Optional Light Kit: The addition of an electric light kit allows VELUX SUN TUNNEL Skylights to be installed in place of an existing electric light for night time use. 

For more detailed information and answers to common questions, check out our Guide to Tubular Daylighting Devices.