A-Rated energy efficiency

Low E-Glass Solutions

Low Emissivity (Low-E) Glass

In order to achieve the U-values required by the building regulations, low emissivity (Low-E) glass must be used. Double and triple glazing units with Low-E glass will perform better than ordinary sealed units.

Low E Glass will:

There are 2 types of Low-E glass:

Hard Coat (Pyrolytic)- Low-E glass has a thin layer of molten tin poured over it while the glass is still slightly molten. The tin welds to the glass making the coating very strong and difficult to scratch or remove.

Soft Coat (Sputtered)-Low-E glass has silver, zinc, or tin applied to it in a vacuum chamber filled with an electrically charged inert gas. Atoms of the coating metal are sputtered onto the surface of the glass where they stick.

To protect it from wear, the low E coated surface is positioned in the outer face of the inner pane in a double or triple glazing layer. The coating allows heat from the sun to enter the building but significantly reduces heat loss from inside the building by reflecting radiant heat back into the room.

Transparency of Low Emissivity (Low-E) Glass

In most instances, the transparency of the glazing is not significantly affected by the Low-E coating, although a very slight tint is discernible in certain circumstances, particularly from the outside.

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