Beautifully slim & highly energy efficient, our Premium Plus windows are BFRC certified and rated 'A' in energy efficiency.
An upgrade of our Premium window system using only the slim internally glazed flat vent and the three slim outerframe options. The slim sight-lines optimise solar gain and when used in conjunction with 90% argon gas filled, soft coat low-e (Low Iron) glass it can achieve excellent thermal values and energy efficiency. You can also have our chelton vent with chelton handle as an A-Rated window (doing so requires triple glazing for an A rating).
... these excellent quality, high efficiency ('A' Rated) windows could save you up to 10% on your heating bills. They have been certified to have achieved this rating with a double glazed sealed unit...