E glass windows

How can glass enable light to enter or exit the home, while preventing heat loss in the winter and heat entry in the summer? Low-E coatings are not visible to the naked eye. However, they are still reflective, just like the silver coating on the inside of a thermos. This reduces the emissivity of the glass and prevents certain types of light from entering or exiting the home. Low-E coatings are selectively reflective, and only allow light of a certain wavelength and frequency to pass through glass 3.

For many homeowners, these benefits can result in significant cost savings over time. In some cases, installation of new energy efficient windows may even improve property values. Home buyers like to purchase homes that have energy-efficient , money-saving features like low-E windows 5. Light takes many forms, but visible light occupies only a fraction of the spectrum. Other parts of the light spectrum include short-wave solar energy UV rays and long-wave infrared heat.

Low-E glass has a coating that reflects short and long-wave infrared rays. The only light that passes through low-E coatings is visible light. Low emissivity glass prevents heat transfer and ensures that visible light is able to pass through the glass in both directions.

Low-E coatings come in two types: hard coat and soft coat. Hard coat is made by pouring melted tin on the glass, while soft coat low-e glass is made with silver, tin or zinc that is applied to the glass in a vacuum. Soft coat low-E coatings have a higher R-value, so they provide better insulation than hard coat 6. During the summer, this reflective coat sends heat back into the atmosphere instead of allowing it to enter into the home via the glass. During the winter, the reflective coat sends heat back into the home to keep the interior of the house comfortable.

This innovative coating, along with the space between the panes of glass, serves as an excellent insulator for residential homes 7. Depending on how many coatings are applied to the window, low-E coatings can cause a window to look somewhat tinted.

This should not affect the clarity of the view through the window and is usually negligible. The sun's UV rays are impacted, but this cannot be seen by humans and is a desirable outcome anyway. Consult the NFRC sticker on your window to see the visible transmittance, or the amount of visible light coming through the window. Low-E glass can help reduce energy costs by reducing the amount of heat that leaves and enters the home on a summer or winter day.

During the summer, low-E glass shuts hot air out of the home. During the winter, low-E glass keeps warm air in the home to reduce the burden on the furnace. Because low-E windows are considered desirable, many home sellers will mention if their home has low-E windows when they list their home on the market. Sun Glass Sun glass offers outstanding thermal performance with a subtle tint that blocks out even more heat from the sun.

Triple-Pane Glass An extra pane of glass helps keep more heat in and cold air out, making this our most energy-efficient glass option. Dual-Pane Glass Clear dual-pane glass offers basic thermal performance. It's available on select Andersen products in situations where codes allow its use.

See your local code official for requirements in your area. Center of glass performance only. Ratings based on glass options available as of June Additional Options. Decorative and Specialty Glass. Decorative and Specialty Glass Safety Glass Tempered safety glass is available on all products, and comes standard on all patio doors. Coastal Glass Options. See your local code official for building code requirements in your area.

Glass Spacers. Dynamic colors: Color laminated glass offers total flexibility, providing the personal touch for unique colors and aesthetics, also affords different levels of translucency for visual screening. Strict quality control and thoughtful customer service, experienced staff all these ensure every new and old customers satisfaction for long time cooperation.

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