Glass with enhanced thermal insulation (Top N+, Stopray, Energy N) where the conventional metal spacer has been replaced by a Warm E spacer.
The Warm E spacer serves as a thermal break at the edges of the glass and therefore considerably reduces heat loss around the edges of the glass.
These characteristics result from the different nature of the materials from which the spacer is composed.
A calculation program for this product can be downloaded by clicking on the following download link 
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