By using our complete system of daylighting products, you will be able to control the light and heat gain to the level with which you are comfortable. The graphs below show the progression of protection and energy efficiency available from VELUX®.

Clear Glass (for reference only)

VELUX® products are not available in clear glass and by looking at the chart it is easy to see why. The light blue color at the top of the chart represents the light and heat rays blocked by clear glass. The bottom line is that clear glass provides almost no protection from heat gain or heat loss.

Comfort™ Double Gazing

Comfort Double Glazing provides a significant improvement in thermal protection over clear glass. It blocks nearly all infrared heat and fade causing UV rays while letting in abundant natural light.

High Performance Double Glazing

The high performance double glazing provides even greater thermal protection while virtually eliminating fade causing UV rays.

Comfort Glazings + Blinds

For even greater control over thermal performance and interior light levels, combine VELUX Comfort Double Glazing or High Performance Double Glazing with VELUX blinds. The chart to the left shows the effects of combining High Performance Double Glazing an interior LightBlock™ blind.

In addition to providing excellent thermal protection, VELUX Comfort glazings protect your interior spaces by blocking up to 83% of the sun's fade-causing rays.