[Equest-users] ERV Impact

Howe, Timothy Timothy.Howe at stantec.com
Fri Nov 30 12:52:34 PST 2012

Did you use capacity control and make-up air temperature control?  If not you will be over heating and over cooling in some conditions as the air will always be going through the heat recovery device.

Timothy Howe, MS, LEED® AP BD+C
Mechanical Engineer
61 Commercial Street
Rochester NY 14614
Ph:   (585) 413-5347
Fx:   (585) 272-1814
Cell: (585) 281-3223

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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Andrew Clagett
Sent: Friday, November 30, 2012 3:00 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] ERV Impact

Hello all. After finalizing my building and obtaining what appeared to be reasonable output, I removed the ERV devices (modeled at 85% efficient cross-flow air to air heat exchangers) from the model to ascertain the energy savings attributable to those devices.

And my total energy consumption went DOWN over 6%! Inexplicably, 'space cooling' and 'pumps & aux.' energy consumption has decreased by a  far larger amount than 'space heating' increased. I would have expected both of those values to increase along with the 'space heating' energy consumption (which did increase).

Anyone have any idea why that might be?

Andrew Clagett, PE, LEED AP
d |  206.436.0494     o | 206.448.3376    e | andrewc at hargis.biz<mailto:andrewc at hargis.biz>    v-card<http://www.hargis.biz/vcards/Andrew%20Clagett.vcf>


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