What is Low-E Glass & Does it Make Windows Energy Efficient?

low-E glass

Low-E glass plays a vital role in the whole performance of a window and can drastically affect the overall heating, cooling and lighting costs of a house. First of all, the Low-E glass must be explained. The in the Low-E Glass stands for emissivity which is the ability of a substance to spread out energy. When light or heat energy from the HVAC system or the sum is engrossed by the glass is moved away by air movement or re-radiated by the glass exterior.

This glass is manufactured to diminish the amount of infrared and ultraviolet light that approach through your windows and door’s glass. In general, extremely reflective resources have low emissivity and dark-colored resource have a high emissivity. All the resources which include windows and doors, the re-radiate temperature in the shape of long-wave infrared energy which depends on the emissivity and heat of their exterior.

Radiate energy is one of the essential ways to transfer temperature with windows. Decreasing the emissivity of the window’s glass exterior enhances a window’s insulating assets. Therefore, Low-E glass can enhance the insulation of your house from the outside temperature in any environment. Low-E glass windows and doors have a lean coating that reflects the temperature. The coating is transparent and lean than human hair. This Low-E glass in your windows and doors keep the temperature constant in your home by shimmering the inner temperature back inside.

There are mainly two types of Low-E Glass:

1. Solar Control Low-E Glass

2. Passive Low-E Glass

What are the factors that measure the effectiveness of Low-E Glass?

Low-E Glass can decrease the amount of high temperature that carries out through glass by almost 30% compared to regular glass. It enhances thermal effectiveness by cutting glare and avoiding damage to inner furnishing by ultra-violet light. The new technology of Low-E glass use toned and laminated glass blend to offer extraordinary performance over the usual glass.

The perfect solution is to combine Low-E glass with double glazing. This solution can stop almost 70% of temperature and 78% of temperature expand when evaluating to regular glass. The efficiency of the Low-E glass can depends on the direction of the coating.

For a single piece window, licensed professionals recommend the Low-E coating is placed on the inner side of the glass surface. These coatings are sensitive to climate and pollution can make it difficult to clean without causing damage to the surface of the glass. For the double piece windows, coating can be placed on the particular side of the glass which depends on what you want to attain.

For hot weather, high-temperature cutback is a priority, the Low-E glass coating can be placed on the inner side of the glass facing on the exterior piece. This will decrease the high-temperature by engrossing solar radiation and shimmering it back outside the house. In cold atmospheres where preservation of high-temperature is a priority, the Low-E glass works excellently by placing outside the of the facing surface. The Low-E glass will captivating inner heat and re-radiating it back into the house. It decreases solar expansion in summer and as well as winter

  • Solar Heat Expansion Coefficient is the portion of happening solar radiation that comes clearly through the windows and doors. This can direct radiated and transmitted inward.
  • U-Value is the score that windows based and allows the defined heat loss.
  • Evident Light Transmittance can measure how much visible light bypass through Low-E glass.
  • Light to Solar Expansion is the fraction between visible light transmittance and its solar expansion coefficient score.


Low-E glass windows and door work efficiently in the home to maintain the inner temperature in hot and cold climates. This Glass enhances solar and thermal control and decreases ultra-violet transmission which fades the furniture in the house. It also decreases compression in double glazing.

Be first to comment

Men's Fashion T-shirts