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Anyone pick up on something at the end of that ad? Hopefully, you will have noticed that Everest have now started saying that their windows are more energy efficient that A rated windows. Naturally, that got me scratching my head. Surely this meant that Everest were ditching WER’s and selling against it? I had to ask, which I did, on Twitter, and this is the answer I got:

As an industry man, you’ll know that a A-rated windows have a positive heat gain from the sun’s heat than those with less efficient windows and even those with A-rated windows that have a lower energy index.

This didn’t really explain what I had asked, or clear up the claim that their windows were better than A rated windows. Saying that insinuates that they have a new type of window that supersedes A rated windows. They also said this: Our uPVC casement windows have an energy index rating of 10, which keep in more heat and create warmer homes.

Again, I put it to them that there are double glazed windows out there with higher energy ratings than that. Are they trying to say that at this time, their A+10 rated windows are better than any others? To clarify, I sent them this image:



Obviously, this Evolution double glazed window has a higher energy rating than +10. So where does this leave the claim that Everest’s windows are more energy efficient than A rated ones? Shaky I’d say. A +10 rating is still very good, lets not take anything away from that, but they certainly aren’t the most efficient on the market.

This is the problem with grand claims. Technology is moving froward so fast, that to make a claim like this, or one that hasn’t been properly researched, is quite risky.

Still, Everest do make quite good ads when it comes to double glazing. It’s a hard thing to create a slick window ad, but they do it quite well.