Low-emissivity (Low-E) glass is a type of energy-efficient glass designed to minimize the amount of ultraviolet and infrared light that can pass through glass without compromising the amount of visible light that is transmitted. This helps to improve thermal insulation and reduce energy costs for heating and cooling. Here's how Low-E glass works:
Mechanism of Low-E Glass
Coating:
Low-E glass has a microscopically thin, transparent coating that is applied to one side of the glass. This coating is usually made of metal or metallic oxide layers that reflect and emit radiant infrared energy while allowing visible light to pass through.
Reflecting Heat:
The Low-E coatnig reflects heat (long-wave infrared energy). In the winter, this reflection helps to keep the heat inside the building, reducing the need for additional heating. In the summer, it reflects heat away from the building, helping to keep the interior cooler.
Blocking UV Rays:
Low-E glass also blocks a significant portion of ultraviolet (UV) rays. This helps to protect interior furnishings, such as carpets, furniture, and artwork, from fading and damage caused by UV exposure.
Types of Low-E Glass
Hard-Coat Low-E Glass (Pyrolytic Coating):
The coating is applied during the glass manufacturing process while the glass is still hot. This type of Low-E glass is durable and can be used in single-pane applications, such as storm windows.
Soft-Coat Low-E Glass (Sputtered Coating):
The coating is applied after the glass is made, in a vacuum chamber at room temperature. This type is typically more efficient at reflecting heat compared to hard-coat Low-E glass but is more delicate and often used in double or triple-glazed windows where it is protected between the panes.
Benefits of Low-E Glass
Energy Efficiency:
Low-E glass reduces the amount of heat transfer, improving the insulation properties of windows. This leads to lower energy bills for heating and cooling.
Comfort:
It helps maintain a consistent indoor temperature by reducing cold spots and drafts near windows in winter and excessive heat in summer.
UV Protection:
Reduces the amount of UV light that enters, protecting furnishings and reducing glare.
Reduced Condensation:
By keeping the interior glass surface warmer in cold weather, Low-E glass can help reduce condensation on windows.
Applications
Low-E glass is commonly used in residential and commercial buildings where energy efficiency and indoor comfort are priorities. It is especially beneficial in climates with extreme temperatures, both hot and cold, but provides advantages in all climate zones.
In summary, Low-E glass improves energy efficiency by reflecting infrared energy, allowing visible light to pass through, and blocking UV rays. Its use in modern windows helps to create more comfortable and energy-efficient living and working environments.
At our sister company, Hub City Home Improvements, we definitely believe in the benefits of glass with Low-E coatings. Give us a call for a quick demo! 806-786-6444
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