Just like your fridges energy rating, windows have an energy efficiency rating that runs from a top rating of “A” all the way down to “G”.
So to keep it as simple as possible “D” & “C” are standard grade windows that lose a fair bit of heat that you have kindly paid for, basically about 25% of your heating bill is wasted through heat loss from your regular standard window.
Expect “D” rated on new build extensions or as poor as “E” rated on window replacements as there is no legal requirement yet to fit any better than this. “Hopefully this will change as tougher enviromental targets kick in and new builds may eventually have to meet higher standards.
An “A” rated window basically means it there is a balance between the heat lost from the home and the heat gained from the sun. This is influenced by the low E coating on the glass, the argon gas infill, the gap between the glazing and the number of chambers within the UPVC frame.
You can rate windows side by side as a +5 “A” rated window is better than a -5 “A” rated window. The plus figure indicating it gains more heat than it loses.
Another reassuring point is “A” rated windows are built better and last much longer as it takes quite a bit of quality engineering and design to produce an energy efficient “A” rated window.
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If you would like a free no obligation quote for an quality windows, doors, garage door, garage conversion, driveway, roof trim or a conservatory then call Freephone 0800 61 98 137 now.
