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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>We have moved away from selecting ERVs with fans because we can’t find any that we’re satisfied with. We generally spec the BPE heat exchangers because the pressure drop is extremely low for the high heat recovery performance. For fans we usually use the Greenheck SQ-VG series (or the loren cook equivalent) with ECM motors or the TMI/ZA series. Both of them are very efficient, but the TMI/ZA fans are a bit better. I think you’ll probably want to go with the TMI/ZA fans with that much static. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:12.0pt;font-family:"Cambria","serif";color:#1F497D'>Morgan Heater</span></b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:12.0pt;font-family:"Cambria","serif";color:#1F497D'>PE, BEMP, LEED AP</span></b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Times New Roman","serif";color:#1F497D'>Ecotope, Inc</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Times New Roman","serif";color:#1F497D'>4056 9th Ave NE</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Times New Roman","serif";color:#1F497D'>Seattle, WA 98105</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Times New Roman","serif";color:#1F497D'><a href="mailto:morgan@ecotope.com">morgan@ecotope.com</a></span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Times New Roman","serif";color:#1F497D'>office: 206-322-3753 ext 209</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></p></div></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Times New Roman","serif";color:#1F497D'>direct: 206-596-4709 </span><span style='color:#1F497D'><o:p></o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Porter, Fred AEC<br><b>Sent:</b> Friday, April 18, 2014 9:17 AM<br><b>To:</b> bldg-sim@lists. onebuilding. org (bldg-sim@lists.onebuilding.org)<br><b>Subject:</b> [Bldg-sim] Reducing Fan Power for ERVs<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m trying to reduce the annual energy use of some DOAS/ERV fans which will run at constant volume 24/7 365 days per year.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Right now we have 3.5” TSP on the supply/OA and 2.25” TSP on the exhaust. I’m looking at some of the obvious measures to reduce the design static. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Right now the fan efficiencies in this unit are in the mid to low 50%s. The fans are part of the ERV and are just described as “forward curved;” I didn’t think a squirrel cage fan could handle that static but whatever they have is rated for it. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>So, would any of the designers on this list have specific suggestions for ERVs with fans that would be more efficient at these conditions?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Fred<o:p></o:p></p><p class=MsoNormal><b><span style='color:black'>Fred Porter, BEMP, LEED</span><span style='color:#1F497D'>©</span><span style='color:black'> AP<o:p></o:p></span></b></p><p class=MsoNormal style='margin-bottom:2.0pt'><span style='color:#7F7F7F'>Senior Energy Analyst<o:p></o:p></span></p><p class=MsoNormal><b><span style='color:#005DAA'>Architectural Energy Corporation<o:p></o:p></span></b></p><p class=MsoNormal><i><span style='font-size:9.0pt;color:#005DAA'>A Member of NORESCO Energy and Sustainability Services<o:p></o:p></span></i></p><p class=MsoNormal><span style='font-size:10.0pt;color:#7F7F7F'>2540 Frontier Ave, Suite 100, Boulder, CO 80301<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#7F7F7F'>Phone 303.459.7425 | <a href="mailto:fporter@archenergy.com">fporter@archenergy.com</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#807F83'><a href="http://www.archenergy.com">www.archenergy.com</a></span><span style='font-size:9.0pt;color:#807F83'><o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:8.0pt;color:#7F7F7F'><o:p> </o:p></span></b></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>