<div dir="ltr"><div>Joe,</div><div><br></div><div>that would be great!</div><div><br></div><div>Leen</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Mar 4, 2014 at 8:17 PM, Joe Huang <span dir="ltr"><<a href="mailto:yjhuang@whiteboxtechnologies.com" target="_blank">yjhuang@whiteboxtechnologies.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Larry,<br>
<br>
I'm not ready to dismiss this effect totally. When I look at a plot of Low-E transmissivity, it's shown to block anything from 800 nanometers on up, although the plot stops at 2400 (see <a href="http://www.leyboldoptics.com/cms/upload/downloads/S_Low_E_Coating_Apollon.pdf" target="_blank">http://www.leyboldoptics.com/<u></u>cms/upload/downloads/S_Low_E_<u></u>Coating_Apollon.pdf</a> page 2). Out of curiosity, I did a Google Search for "Low-E windows block cell phone signals" and found this question raised in various web pages. Expanding on what I had said previously, I do know of a building in Beijing (China Academy of Building Research) that did a facade retrofit a few years back, after which the staff reported they could no longer get cell phone signals. I think I'll send my colleagues an e-mail to ask for more details.<div class="im HOEnZb">
<br>
<br>
Joe<br>
<br>
Joe Huang<br>
White Box Technologies, Inc.<br>
346 Rheem Blvd., Suite 108D<br>
Moraga CA 94556<br>
<a href="mailto:yjhuang@whiteboxtechnologies.com" target="_blank">yjhuang@whiteboxtechnologies.<u></u>com</a><br>
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<br>
<br></div><div class="HOEnZb"><div class="h5">
On 3/4/2014 7:26 AM, <a href="mailto:ldegelman@suddenlink.net" target="_blank">ldegelman@suddenlink.net</a> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
I don't see how there could be any effect at all. The wavelengths are totally incompatible. Low-e coatings block the near-infrared radiation at wavelengths of 700 to 2400 nanometers. Even at the ultraviolet end, the wavelengths are around 100 to 400 nanometers. The 3G and 4G networks that cell phones use are way off from this. Typically, cell phone wavelengths (at 0.8 to 2.4 Ghz, the RF portion of the spectrum) are about one foot long (or around 300 million nanometers) - not even in the same ball park.<br>
<br>
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\<u></u>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\<u></u>\\\<br>
Larry O. Degelman, PE, FIBPSA, ASHRAE<br>
Professor Emeritus of Architecture<br>
Texas A&M University<br>
//////////////////////////////<u></u>//////////////////////////////<u></u>//<br>
-----Original Message----- From: Russell Richman<br>
Sent: Monday, March 03, 2014 10:00 PM<br>
To: leen peeters<br>
Cc: BldgSim Mailing List<br>
Subject: Re: [Bldg-sim] radiation through glazing<br>
<br>
these types of glazing systems will help reduce EMF's from the exterior. As such, they 'may' reduce cell phone wave lengths as well. I have not come across any studies, but the physics says it is possible.<br>
-russell<br>
<br>
On 2014-03-03, at 6:47 PM, leen peeters wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
Dear all,<br>
<br>
is there anyone aware of a negative impact of triple glazing or foils used in triple glazing on the transmittance of mobile phone signals?<br>
<br>
<br>
Any input is welcome ...<br>
<br>
leen<br>
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