Sealing Vinyl Windows from Off-Gassing?
Last Post 29 Jun 2012 10:23 AM by BobMaynes. 24 Replies.
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greentreeUser is Offline
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28 Jun 2012 11:28 PM
Bob,
Are the european windows with the ultra low u values because of the european method of calculating u? I'm trying to figure out how these niche companies are making the ultra low u value windows. I've been perusing the glass supplier websites, manufacturer websites, playing with quanex optimizer and it just isn't making sense to me yet. Can you shed any light?


BobMaynesUser is Offline
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29 Jun 2012 04:38 AM
Wow! You have been doing your due diligence! Yes, the way the Europeans are calculating U-Values is somewhat different than how we're doing it, but I'm getting in a little over my head here. We have a guy at Mathews Brothers that focuses on this and all our testing. He could speak to this far more intellegently than I, so I can reach out to him later today and find out. As for us, we're producing some windows with very respectable U-Values (0.20 range), but I would caution you on focusing solely on the U-Value. Oftentimes, manufacturers will sacrifice performance of the other metrics (Solar Heat Gain, Visibible Transmittance, Condensation Resistance, Structural Performance, to name a few), in order to achieve the Holy Grail of 0.20 U.

We just produced an informational pamphlet that hasn't even made it back from the printer, which explains all the performance tests. A lot depends on which part of the country you are in, orientation of windows, etc. I can send you a PDF if you'd like. Please email me at [email protected] so I can reply privately, unless you want your email out there for the world to see.

By the way, you're obviously familiar with Quanex... we're using their(Quanex Mikron) Energy Core profiles with their (Quanex Truseal) Duralite spacer in the product line I've referenced here.


cmkavalaUser is Offline
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29 Jun 2012 08:57 AM
Bob; thanks for your post and clearing up the "Hogwash"


Chris Kavala<br>[email protected]<br>1-877-321-SIPS<br />
windowrookieUser is Offline
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29 Jun 2012 10:16 AM
Bob

The testing method for Europeans is different. Their ambient outdoor temperature is 0 degrees while here it is lower. Therefore a different U value as a result. That is why everyone should only use the NFRC for comparisons.

I would however like to advise you about your reference about the former founder of Greenpeace Dr. Patrick Moore as I have had this same discussion here before. He advocates clearcut logging, nuclear power, farmed salmon, PVC (vinyl) production, genetically engineered crops, and mining. His latest financial venture is to promote for the Petroleum Producers the tar sands/Keystone XL pipeline as environmentally friendly. But I will let Greenpeace speak for themselves.

http://www.greenpeace.org/usa/en/media-center/news-releases/greenpeace-statement-on-patric/

My last post was a copy and paste from the Intus webpage which are a vinyl window manufacturer. Perhaps LBear could have one of their reps post a response about this subject.


BobMaynesUser is Offline
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29 Jun 2012 10:23 AM
Well, after reading the Greenpeace article, I find it full of half-truths, exaggeration and opinion stated as fact. I always find it interesting when someone from the environmental movement leaves the fold. The long teeth come out and the personal attacks begin. Thanks for the link, though. It's good to have as a reference.


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