How Does Low-E Glass Work?31/05/2018
Our modern conservatories are much more energy efficient than the conservatories that were installed back in the 1970s and 80s. This is because we use glass that minimises heat loss as standard. Low emissivity glass is a technological wonder of the modern age. We thought we’d briefly explain what it is and how it works.
What Is Low-E Glass?
Low emissivity glass is a windowpane that is coated in energy-efficient microscopic layers of metallic oxides, which are designed to prevent heat loss. The coating is invisible to the naked eye, allowing the highest levels of natural light possible into your house. To put the size of the coating into perspective, they are measured in a unit called nanometres. A human hair is 75,000 nanometres wide, while the metallic coating on Low-E glass is a mere 150 nanometres wide.
How Does Low-E glass actually work?
Low emissivity glass has been developed to minimize the amount of ultraviolet and infrared light that can pass through glass, without compromising the amount of visible light that is transmitted. Ultraviolet and infrared light can cause damage to furniture, fabrics and wall coverings, which was a common problem in older conservatories before Low-E glass became widely available.
Whenever heat or light energy is absorbed by glass, it’s either shifted away by moving air or re-radiated by the glass surface. The ability of any material to radiate energy is known as emissivity. Generally speaking, highly reflective materials have a lower emissivity than darker coloured materials. All materials, including windows radiate heat in the form of long-wave, infrared energy depending on the surface’s emissivity and temperature. Radiant energy is one of the most important ways heat transfer occurs in windows.
Due to the microscopically thin metallic coating, Low-E glass is very good at reflecting heat (infrared energy). This means in winter when the interior heat tries to escape back to the colder outside temperatures, the Low-E glass reflects the heat back inside, reducing heat loss and keeping the conservatory warm. This process is reversed in summer in order to keep the conservatory cooler in the heat.
We have a wide range of conservatories and orangeries available, coming with an even wider range of design options. You can choose from a variety of different conservatory styles, frame colours and glass options including low emissivity and low maintenance glass. Not only is Low-E glass very effective at reducing heat loss, it will also help add value to your conservatory.
Interested in having your own conservatory built? We can help, call us on 01953 600505 or email us on email@example.com.
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