Does low emissivity glass have a tint?

Unlike tinted glass which filters light (short wavelengths), low emissivity window coatings filter heat (long wavelengths). This ensures that visibility remains similar to windows without a low emissivity coating.

Does low emissivity glass prevent fading?

Low emissivity coatings are capable of filter out up to twice as much ultraviolet (UV) light than standard windows. This reduces UV damage on chairs, sofas, carpets, curtains, and other household items that could be damaged by the sun.

How long do low emissivity window coatings last?

Low emissivity window coatings last 10 to 15 years, on average. The lifespan varies and is dependent upon climate and exposure.

How do you know if your windows low emissivity coating is bad?

If a windows low emissivity coating begins to deteriorate or fail, you will notice small round spots within the window cavity. As the coating deteriorates further, the spots will increase in size and often resemble soap bubbles.

Learn about Low-Emissivity Window Coating

Low emissivity (low-e) window coating is a metallic oxide window coating that minimizes natural ultraviolet and infrared light which passes through windows. Specifically, the coating reflects long-wave (thermal) radiation but can allow short-wave (solar) radiation. A low emissivity coating can be applied to one or more surfaces in multi-pane windows.

Low emissivity coatings are typically applied during manufacturing. Look for Energy Star certified windows that specify low-e coating in the product description. Low emissivity coatings have been designed for high solar gain (better for cold climates), moderate solar gain, or low solar gain (better for hot climates).

Low emissivity coatings reduce heat loss through a window, which can reduce the heating load in a house.

Long-wave radiation is also called infrared radiation, and it is invisible to the human eye. Short-wave radiation from the sun is also called visible light and is visible, and its most important property is color!