U-Factor rating

A U-Factor rating determines the amount of heat that is lost through an object. The lower the number, the better the insulation value. As a basis for comparison, a double-pane window typically receives a 0.4 U.S./I-P.

The Skylight Tube is given a U-Factor of 0.3 U.S./I-P by the National Fenestration Rating Council (NFRC), better than a typical double-pane window.

Solar Heat Gain

Solar heat gain measures how well a product blocks heat caused by sunlight. The lower the light tunnel’s solar heat gain coefficient, the less solar heat it transmits into the house.

The Skylight Tube is given a solar heat gain coefficient of 0.2, one of the industry’s best ratings. Minimize solar heat gain and maximize energy savings with the Skylight Tube’s double–layer roof lens, creating a dual pane effect.

What qualifies a product to receive the Energy Star label?

The Energy Star program develops performance-based specifications which determine the most efficient products in a particular category.

Cold Climate Lens Kit

The Optional Extreme Cold Climate Lens Kit includes 2 additional lenses to further reduce energy loss. View more or call 1-866-446-0966.