In response to your leader in Fenestration News dated 4 June, I would like to argue the case for Warm Edge Technology (WET). We don’t deny that WET has always been around – in fact you are underestimating its history significantly by suggesting it’s 25 years old. Several years ago we educated the market to the fact that WET isn’t a new technology at all with the very first patented glass unit way back in 1865 by Thomas Stetson incorporating WET. Edgetech’s own technology has just reached the milestone of 20 years and continues to set the benchmark for all other WET in both thermal performance and durability. However I don’t think a product can be described as old news when the majority of the market has yet to discover it. Even now only 20% of the UK market has made the switch. From your letter I’m guessing you may argue that more haven’t switched because you don’t believe it makes much difference to the overall performance of a window, but that’s simply not the case.
The benefits to the consumer of buying a good WET such as Super Spacer are many. Improved energy efficiency is most certainly one of them. It may even be the most important benefit because of the drive towards green technologies and practices by Government, consumers and industry – a trend much bigger than any WET manufacturer could control! All we can do as responsible suppliers is help our industry meet this demand. But it’s important to remember these aren’t the only benefits provided by a good WET. Another major advantage is the reduction in condensation for example – a problem our industry has faced for many years. A problem that becomes even more serious when you consider the fact that the mould produced by condensation in windows provides a breeding ground for dust mites. There is clear evidence that the more dust mites in a house, the more asthma in children and adults can be found. Super Spacer can reduce condensation on the edge of the glass by as much as 70% - hardly an insignificant difference!
Going back to energy efficiency the facts again speak for themselves. A good Warm Edge Technology brings the overall u-value of a window down significantly – able to offer a saving of up to 15% which is as much as any other component part including soft coated low E glass or indeed gas filling. Other WETs may not improve the performance of the overall window by this much but its unfair and factually incorrect to suggest that all WETs make little or no difference to the overall window. Of course we measure a window as an overall unit, but each component within the whole has its part to play. I wouldn’t say that any single component is irrelevant – I’m sure you wouldn’t argue soft coat doesn’t have an impact for example. So every component has a part to play in improving the energy performance of a window and to discount any one of those components in my opinion would be a missed opportunity to provide the very best, which is surely what we should all be striving to do.
Managing Director, Edgetech