When choosing a sliding door, it is important to pay attention to the type of glazing option. The type of insulating glass on a sliding door, due to glass dimension, seriously affects its insulation factor. Because the cost of heating is continuously increasing, a glass with high energy properties will shortly pay for itself in economy and comfort.

There are three ways of increasing the insulation of an insulating glass built with two panes of glass:

1.  Applying a transparent metallic coating.
2.  Replacing the air between the two panes of glass with an inert gas.
3.  An insulating glass spacer.

It is also possible to choose an insulating glass built with three panes of glass.
1.  Applying a transparent metallic coating. Glass having a metallic oxide coating is called low emissivity glass (also known as Low-E). You will also have the benefit of variable protection against the sun’s UV rays which damage carpets and fabrics.

Fenplast offers, as an option, the Low-E ES© glass, designed to maximize the energy potential of a sliding door using an exceptional ER (Energy Rating) indicator. 
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2.  Replacing the air between the two panes of glass with an inert gas.

Inert gas between the two glass panes reduces conductivity (when compared to air) and increases the temperature of the internal surface of the insulating glass. Argon is the gas most often used.

All insulating glass manufactured by Fenplast are injected with Argon gas to a minimal and certified rate fill of 95%, thereby maintaining the warmth of your home without any additional expense.

3.   An insulating glass spacer.

The glass spacer is the part that separates the two panes of glass along the perimeter of the insulating glass and that allows to reduce the conductivity and offer superior insulation.

Several types of insulating glass spacers are available and fill this function with varying degrees of success.
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Fenplast uses an insulating spacer, which is approved by NASA and made of doublesealed structural foam edge called the Super Spacer TM. This type has all the advantages of a non-metallic insulating glass spacer while maintaining the features of durability and gas retention which meet the highest international standards.
 Triple Glazing

With triple glazing and two half-inch air spaces in the insulating glass (1¼" overall thickness), you can have the “warmest” door available on the market that will protect you from harsh winters. Remember that your sliding door is probably the largest glass surface in your house.

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