Energy efficient Patio Windows
Everybody knows that installing double glazing can help you lower your heating costs by reducing heat loss, but with the advent of low emissivity glass (low-e glass) energy efficiency for double glazed patio windows has gone up to another level.
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Previously, the top of the WER (window energy rating) would have been ‘A’ rated windows but now you can get up to A++ which is extraordinary.
The ratings from the British Fenestration Rating Council (BFRC) are graded from A-G with G being the lowest energy efficiency rating – but they had to introduce the ++ in order to keep up with modern upgrades in thermal efficiency of uPVC Windows & the improvements in glass technology.
The WER applies to the whole of the complete Patio Door so that whilst using a very energy efficient glass is important, if your frames are not up to the mark, then having low-e glass won’t help much because you lose heat from the bad frames themselves.
