<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:10pt">Noa:<br><br>You can select natural ventilation in eQuest under the Air-Side HVAC System Parameters, Outdoor Air, Natural Ventilation. I would use the Sherman-Grimsrud method. From eQuest help - "Sherman-Grimsrud" method in which the air change rate depends on
wind speed, inside-outside temperature difference, and wind shielding of the
building. In this case, the keywords MAX-VENT-RATE, HOR-VENT-FRAC, and
FRAC-VENT-AREA are applicable.<br><br>Therefore I would calculate the vent area (window opening) and set up a fractional schedule to account for the percent the windows are opened throughout the occupied schedule. <br><div> </div>Paul Diglio, CEM, CBCP<br><br><div>87 Fairmont Avenue<br>New Haven, CT 06513<br>203-415-0082</div><br><br><div><span><a target="_blank" href="http://www.pdigliollc.com">www.pdigliollc.com</a></span><div><br></div><div style="font-family:times new roman, new york, times, serif;font-size:10pt"><br><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Daniel Knapp <danielk@arborus.ca><br><b><span style="font-weight: bold;">To:</span></b> noa@gbwawa<br><b><span style="font-weight: bold;">Cc:</span></b> equest-users@lists.onebuilding.org<br><b><span style="font-weight: bold;">Sent:</span></b> Thu, April
25, 2013 9:59:36 AM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [Equest-users] defining the windows for natural ventilation<br></font><br>
Hi Noa,<br><br>My understanding is that eQuest does not calculate natural ventilation at all. The program is not designed to support calculations of the movement of air between zones. The outdoor air flow in the HVAC window is outdoor air introduced by the mechanical system and not through windows. I think you would be better off looking to another tool (maybe EnergyPlus/OpenStudio?) that explicitly supports these calculations.<br><br>All the best,<br>Dan<br><br><br>—<br>Daniel Knapp, PhD, P Phys, LEED® AP O+M<br><a ymailto="mailto:danielk@arborus.ca" href="mailto:danielk@arborus.ca">danielk@arborus.ca</a><br><br>Arborus Consulting<br>Energy Strategies for the Built Environment<br><span><a target="_blank" href="http://www.arborus.ca">www.arborus.ca</a></span><br>76 Chamberlain Avenue <br>Ottawa, ON, K1S 1V9 <br>Phone: (613) 234-7178 ext. 113<br>Fax: (613) 234-0740<br><br><br><br><br>On 2013-04-24, at 11:12 AM, noa@gbwawa <<a
ymailto="mailto:noa@gbwawa.com" href="mailto:noa@gbwawa.com">noa@gbwawa.com</a>> wrote:<br><br>> Hi all,<br>> <br>> I just understood that e-Quest dosn't calculate natural ventilation without making some definitions.<br>> I found that in the detailed mode, in the HVAC window, I can define the outdoor air flow, but how do I define what is the area of the window that opens? It could be only half of the window area or all of it for example.<br>> So what are the parameters that I need to fill out in order to be exact in the natural ventilation definition? And where could I find it?<br>> <br>> Thank you<br>> <br>> Noa Hakak,<br>> <br>> Green building project manager<br>> WAWA<br>> _______________________________________________<br>> Equest-users mailing list<br>> <a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org"
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