Low E Window Coatings

Hold a lit match or a pen light up in front of the window.

Low e window coatings.

U value is the rating given to a window based on how much heat loss it allows. Recommended for north facing windows. Low e meaning low emissivity is an extremely thin layer of metallic particles or more commonly several layers applied to the glass that in simple terms allows the glass to act like a sieve. Low e glass reflects heat in the summer and helps keep heat inside in the winter making this a good choice in climates where both heating and cooling costs are a concern.

Solar control low e coatings soft coat. Solar heat gain coefficient is the fraction of incident. Loe 180 the standard low emissivity coating helps keep the warmth inside your home and reduces harmful effects of uv. Low emittance low e is a coating that increases a window or door s ability to diminish heat transfer thus saving heating and cooling costs.

Long wavelengths or heat are filtered out while short wavelengths the visible light spectrum are allowed to pass through. The following are used to measure the effectiveness of glass with low e coatings. Low e argon gas windows. Visible light transmittance is a measure of how much light passes through a window.

By comparison low e glass coatings can have an emittance as low as 0 04. There are three common applications of low e coatings for residential windows. Low e glass includes a microscopic transparent coating that reflects infrared energy or heat. Homeowners can test for the low e coating in a window by doing the following.

The low e coating is usually placed on one of the inside glass pane surfaces of the insulating unit. The passive low e coatings are manufactured using the pyrolytic process which. Such glazing would emit only 4 of the energy possible at its temperature and thus reflect 96 of the incident long wave infrared radiation. Then you just determine which flame that is and that indicates what surface the low e coating is applied to.

Low e coatings were developed to minimize the amount of ultraviolet and infrared light that passes through glass without compromising the amount of visible light that s transmitted. In addition to energy savings low e also effectively reduces the amount of transmitted ultraviolet light which can damage carpets fabrics and drapes. Most companies that manufacture vinyl windows offer loe 180 included in the price of the window. Not all low e coatings are the same.

Window manufacturers product information may not list emittance ratings. Low e low e4 glass most people can enjoy optimal energy performance and comfort with low e low e4 glass. Types of low e coatings passive low e coatings hard coat.