This web site provides unbiased information on the benefits of energy-efficient windows, descriptions of how they work, and recommendations for their selection and use.

For existing windows, low-E coatings are also available on films which can be applied to the inside surfaces. They are less common than the solar films designed solely to block ...

Home > Products > Windows, Doors, and Skylights > Anatomy of an Energy Efficient Window. Anatomy of an Energy Efficient Window

Andersen 400 series windows & patio doors for replacement or new construction come standard with glass that stays cleaner and reduces water spotting.

Some windows use four glazing layers (two glass layers and two suspended plastic films). Both Low-E coatings in this product have high visible light transmittance.