Thanks, Bill! Two good options to try.<br><br>Carol<br><br><div class="gmail_quote">On Fri, Feb 19, 2010 at 5:05 AM, Bishop, Bill <span dir="ltr"><<a href="mailto:wbishop@pathfinder-ea.com">wbishop@pathfinder-ea.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Carol,<br>
<br>
You can select furnace as a baseboard heating source. (I've done this to<br>
represent gas-fired radiant heaters that share a space with a MAU.) You<br>
could set the BASEBOARD-CTRL to outdoor reset and use a schedule that<br>
matches the OA temperature at which the heat pump shuts off (if that's<br>
the case). Using this option, maybe you could select a supplemental heat<br>
source but set it to zero capacity, allowing you to specify the MIN-HP-T<br>
at which the heat pump shuts off. Using furnace baseboards, I wonder<br>
what the HIR is, though, since there is no place to enter it for<br>
baseboards.<br>
<br>
You could also select "electric" for the supplemental heat source, put<br>
it on a different meter, and convert the energy to therms afterward<br>
using the efficiency of the supplemental furnace.<br>
<br>
Regards,<br>
Bill<br>
<br>
William Bishop, EIT, LEED(r) AP | Pathfinder Engineers & Architects LLP<br>
Mechanical Engineer<br>
<br>
134 South Fitzhugh Street<br>
Rochester, NY 14608<br>
T: (585) 325-6004 Ext. 114<br>
F: (585) 325-6005<br>
<br>
<a href="mailto:wbishop@pathfinder-ea.com">wbishop@pathfinder-ea.com</a><br>
<a href="http://www.pathfinder-ea.com" target="_blank">www.pathfinder-ea.com</a><br>
Please strive to live sustainably.<br>
<div><div></div><div class="h5"><br>
-----Original Message-----<br>
From: <a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a><br>
[mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>] On Behalf Of Carol<br>
Gardner<br>
Sent: Thursday, February 18, 2010 8:04 PM<br>
To: <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
Subject: [Equest-users] Heat pump with furnace backup<br>
<br>
Has anyone ever had to model an air source heat pump using a gas furnace<br>
<br>
for supplemental heat? It is not valid to select furnace as a<br>
supplemental heat source, although eQUEST will still run if you do so,<br>
so I need a work-around to get accurate output. Any ideas?<br>
Thanks in advance,<br>
Carol<br>
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