<html><body bgcolor="#FFFFFF"><div>Low-e glass, as the name suggests, has a lower emissivity than regular glass. With an IR camera you can clearly see your thermal reflection, so in many cases with a non-contact thermometer you're taking the temperature of your own forehead. A strip of matte black electrical tape provides a more accurate measurement.<br><br><div><span class="Apple-style-span" style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); "><br></span></div><div><span class="Apple-style-span" style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); ">Ross Elliott</span></div><div>Homesol Building Solutions</div><div><br></div><div>Sent from my iPhone</div><div>Please send replies to <a href="mailto:relliott@homesol.ca"><a href="mailto:relliott@homesol.ca">relliott@homesol.ca</a></a></div></div><blockquote type="cite"><div><span>-------------------</span><br><span></span><br><span>Message: 8</span><br><span>Date: Wed, 2 Mar 2011 09:15:27 -0500</span><br><span>From: John Straube <<a href="mailto:jfstraube@gmail.com">jfstraube@gmail.com</a>></span><br><span>To: Green Building <<a href="mailto:greenbuilding@lists.bioenergylists.org">greenbuilding@lists.bioenergylists.org</a>></span><br><span>Subject: Re: [Greenbuilding] infrared thermometer</span><br><span>Message-ID:</span><br><span> <<a href="mailto:3A214541-4F19-49D1-9FF1-D6F3E869D7E4@civmail.uwaterloo.ca">3A214541-4F19-49D1-9FF1-D6F3E869D7E4@civmail.uwaterloo.ca</a>></span><br><span>Content-Type: text/plain; charset=us-ascii</span><br><span></span><br><span>Emissivity of glass is about 0.84, which is not far off a unit with a default of 0.90, like within a degree or two.</span><br><span></span><br><span>On 2011-03-02, at 9:11 AM, Sacie Lambertson wrote:</span><br><span></span><br><font class="Apple-style-span" color="#005001"><br></font></div></blockquote></body></html>