VELUX skylights come standard with energy-efficient LoE3-366 glass, which is the only glass that guarantees compliance in all four ENERGY STAR climate zones for a double-pane window. LoE3, or low-emission cubed, is a virtually invisible metallic coating placed on the surface of the skylight to reduce its U-factor by subduing radiative heat flow through the skylight. And “366” simply means there are three layers of the coatings with 66% light transmittance for the glass only. Together, they strike the perfect balance between solar control and uninterrupted visibility.
Additionally, our latest models of skylights come with Neat glass, which combines energy-efficient LoE3 dual-paned glass with a special coating that works with the sun and rain to remove debris and lessen water spots. This combination offers the ultimate solution for low-maintenance skylights with energy savings of up to 25% annually.