What Is a Low E Glass?
Low-E Glass full name Low-Emissivity Glass, glass was created to minimize the amount of infrared and ultraviolet light that comes through your glass, without minimizing the amount of light that enters your home.
Low-E glass windows have a microscopically thin coating that is transparent and reflects heat. The coating is even thinner than a human hair!
The Low-E coatings keep the temperature in your home consistent by reflecting the interior temperatures back inside.
Types of Low E Glass
There are two types of Low-E glass:
- Hard coat (online)
- Soft coat (offline).
Hard Coat Low-E Glass
Hard coat Low-E glass is made by coating the glass during production with a thin metallic oxide layer, effectively welding it to the glass surface.
Soft Coat Low-E Glass
Soft coat Low-E glass, or sputter coating, is applied to glass that has already been formed.
Advantages of Low E Glass
Low E Glass Reduce Energy Costs
- Low-E glass has an invisible coating that reflects long-wave infra-red radiations towards the interior of the building.
- They keep the interiors cooler in summer and warmer in winter months; effectively decreasing the use of energy appliances by controlling the indoor temperature.
Low E Glass Reduce Destructive UV Rays
- Because it resists ultraviolet light, low-E glass prevents sunlight exposure from damaging carpets, draperies, sofas and other furnishings.
- And, low-E glass reduces sunlight glare in a room. The coatings reduce glare and reflect the sun’s heat away from the structure.
Low E Glass Do Not Block All Natural Light
- Low E windows block infrared light and UV light, but one other vital component makes up the solar spectrum, visible light. Of course, they will reduce visible light slightly, compared to a clear glass pane. However, plenty of natural light will brighten your room.
Low E Glass Reducing Electricity
- They help in reducing electricity bills, as they maintain the temperature of the room at the desired level.
Low E Glass Compared to Normal Glass
- Low e glass provides better performance as compared to single-glazing glass and double glazing glass. So it is extensively used in glass facade in cold climates.
Disadvantages of Low E Glass
Windows that are designed to block out UV rays and infrared light are generally going to be more costly than traditional windows.
This means that you will have a larger initial investment to deal with.
What Is Hard Coat Low-E Glass?
Hard Coat Low E is applied at a very high temperature and is sprayed onto the glass surface.
The advantage to hard coat is that it can be tempered after the coating application and it offers to accessorize with the glass such as blinds in-between the panes.
What Is Soft Coat Low-E Glass?
Soft Coat Low E uses a thin layer of silver, applied using a ‘sputter’ process to a pre-cut section of glass in a vacuum chamber at room temperature.
The finish is referred to as ‘soft coat’ as the coating remains fairly delicate (which is why soft coat is always found on face two or three).