How Does Low-E Glass Save Energy?

May 12 , 2022

How Does Low-E Glass Save Energy?


How Does Low-E Glass Save Energy?

Choosing everything for your house can be hard if you do not have a proper list. Similarly, choosing the type of glass for windows can also be hard. According to the experts, 70% of energy is lost because of the wrong choice of doors and windows. Almost 90% of windows are imperfect, and you can lose energy at a sufficient level.

Although energy efficiency is essential, maintaining it isn't easy to understand. There are different types of energy-efficient glass. You will know about the best Low-E window glasses and their details over here.

What Does Low-E Glass Mean?

For minimizing the amount of infrared and ultraviolet rays, low-emissivity or Low-E glass was created. It minimizes the amount of light that will enter the house. There is a microscopically thin coating on Low-E glass that is used for reflecting the heat. This coating is thinner than our hair. The low-E coating helps in keeping the temperature consistent in the home by reflecting.

When making a Low-E glass, there are several measures taken. These measures help the windows in making glasses maintain the temperature. There are a lot of reliable businesses that provide glass for an affordable price. You must make sure that the glass is of triple-pane if you want to make it high performance.

How Does Low E-Glass Work?

Measures that are taken to make glasses high-performing are proven in research laboratories. Below are the things included in Low-E Glass:

Solar Heat Gain Coefficient (SHGC):

The first and most important thing in any E-Low glass is that it must have SHGC. It is actually a fraction of the incident solar radiation that a window emits. It can either be radiated inward, absorbed, or directly transmitted.


U-Value is actually a rating that a window is given on how much heat it will lose or will allow losing.

Visible Light Transmittance (VLT):

VLT is a full measure of light that passes through the window glass.

There are many forms of light, as we know. But the visible light takes only a small part of the spectrum. The other parts are taken by radiations, short-wave solar energy (UV rays) and infrared rays, etc. This Low-E glass includes a coating that helps in reflecting long-wave infrared and short wave UV.

So, the only light that is allowed to pass is visible light through Low-E, and it saves energy. In addition, it prevents heat transfer and ensures that only visible light can pass through both directions.

Types of Low-E Coatings:

Low-E Coatings are of different types. Below are the most common ones:

Passive Low-E Coatings (Hard-Coat):

The pyrolytic process is used to manufacture passive Low-E coatings. There is the glass ribbon on which the coating is applied, and it is produced on a floating line. Then the coating fuses into the hot glass surface. A strong bond is created due to fusion that is durable and is known as a hard bond.

Solar Control Low-E Coatings (Soft-Coat):

Low-E Solar control coatings use Magnetron Sputtering Vapor Deposition (MSVD) process in manufacturing. It means that pre-cut glass has a coating that is applied a room temperature while placed inside a vacuum chamber. There is an insulated glass where the soft coat is sealed. It helps in solar control performance.

Benefits of Low-E glass:

There are many benefits of Low-E glass coating. Few are discussed below:

•    The Low-E glass windows help in reducing the cost of energy. It helps in blocking infrared light that penetrates from the glass outside.

•    The destructive UV rays are reduced by Low-E glass windows. They help in reducing UV light.

•    They do not block the natural light at all.

Why Installing Energy-Efficient Low - E Glass In Your Home:

There are a lot of benefits of installing Low-e glass in your homes. Below are the ways in which Low-E coating can be beneficial:

•    These help a lot in reducing heat loss dramatically. They help in transferring and eventually reduce heat loss by almost 50%.

•    They save a lot of costs. There is a clear reduction in energy bills if you use Low-E glass.

•    Another best thing is that it is not visible to people and acts great.

•    Low-E Coating is no doubt durable. It cannot be scratched off, damaged, or wiped away. The reason behind this is that the coating is applied inside the glass.

•    It helps in protecting the flooring material, upholstery, and furniture. The UV rays get prevented from damaging furniture and penetrating.

These amazing benefits can help many house owners. As a result, Low-E is completely cost-saving over time. In addition, the property value is increased due to the installation of E-Low in most areas. The buyers go for houses that are energy efficient and save their money. This work can be done by Low-E installation.

Performance of Low-E coating :

These come in two types of coatings, as we discussed earlier. Both coats help the Low-E glass maintain the heat and temperature. This makes it more efficient and also energy-saving. It has more performance levels compared to normal glass.

Performance Of Low-E Glass In Different Seasons:

This reflective coat reflects heat back into the atmosphere during the summertime rather than allowing it to enter the residence via the glass. The reflective coat reflects heat back into the home during the wintertime, keeping the interior cozy. In conjunction with the gap between the glass panes, this unique coating acts as a superb insulator for residential dwellings.

Does Low-E Glass Effect Upon The Factor That How Much Sunlight Enters Your Home?

Low-E coatings can cause a window to appear tinted depending on how many coatings are added. This should have little impact on the sharpness of the view through the windows and is usually insignificant. The sun's UV rays are affected, but this is invisible to people and is a favorable goal in any case. Inspect the NFRC sticker on your window to determine the visible penetration or the amount of visible light that passes through it.

Leave a comment

Please note, comments must be approved before they are published