05 Apr '12, 2pm

Do I Really Want Radioactive Windows? by Alex Wilson on 04/03/2012 via @addthis

Further to my previous comments about seal leakage in IGUs, I would like to point out the significance of the phrases "laboratory testing", "field testing", "From repeatedly testing several dozen windows over a period of years" and "in the field". When it comes to testing gas leakage rates from sealed IGUs, it seems to me that this could only be reasonably accurately done by first measuring the production fill mass of the gas in question (a value probably arrived at by dividing the amount of gas used to fill a large number of IGUs by that number), then measuring the amount of gas left when the seal is broken on a sample IGU in a previously evacuated chamber. If that were the case, the leakage rate results could be strongly influenced by variability in the initial fill and in quality of the seal, with it being practically impossible to determine which had the greater influe...

Full article: http://www.buildinggreen.com/live/index.cfm/2012/4/3/Do-I...

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