[Equest-users] heat recovery and zone exhaust

[Bruce Easterbrook]

I don't think building codes will allow you to do that, not easily 
anyway.  AnOntario/Canada perspective though.  Each of the apartments 
will be it's own fire compartment.  Everything breaking this barrier 
will need fire dampers.  All fire dampers need man access.  May be much 
more trouble than it is worth.
Bruce Easterbrook P.Eng.
Abode Engineering

On 12/09/2013 04:35 PM, Vipul Babriya wrote:
> HelloBill/James,
>
> I have a typical situation for DOAS system that serves fresh air (100% 
> OA) to corridor spaces in multifamily building. The DOAS unit is 
> equiped with heat recovery wheel, and uses the exhaust air from 
> apartments, i.e. exhaust from bathroom and kitchen rather than return 
> air from corridor itself. How would i model the system that uses 
> recovered heat from one system to another in the eQUEST.
>
> Thanks in advance for your help.
>
> Regards,
> Vipul
>
>
>
> -----Original Message-----
> From: Bishop, Bill <wbishop at pathfinder-ea.com>
> To: James Hansen <JHANSEN at ghtltd.com>; equest-users 
> <equest-users at lists.onebuilding.org>
> Sent: Wed, Dec 15, 2010 10:04 am
> Subject: Re: [Equest-users] heat recovery and zone exhaust
>
> James,
> Make sure to NOT enter zonal exhaust flows if your intention is for 
> the air to return to the ERV. Specifying zonal exhaust simulates air 
> leaving the zone through a separate exhaust fan (think bathrooms, 
> kitchens, clothes dryers) and not returning to the air handling unit.
> Regards,
> Bill
> *William**Bishop, PE**, BEMP, LEED^® AP **|****Pathfinder Engineers & 
> Architects LLP***
> Mechanical Engineer
> 134 South Fitzhugh StreetRochester, NY 14608
> T: (585) 325-6004 Ext. 114F: (585) 325-6005
> wbishop at pathfinder-ea.com 
> <mailto:wbishop at pathfinder-ea.com>www.pathfinder-ea.com 
> <http://www.pathfinder-ea.com/>
> PSustainability -- the forest AND the trees.P
> ------------------------------------------------------------------------
> *From:*equest-users-bounces at lists.onebuilding.org 
> <mailto:equest-users-bounces at lists.onebuilding.org> 
> [mailto:equest-users-bounces at lists.onebuilding.org 
> <mailto:equest-users-bounces at lists.onebuilding.org?>] *On Behalf Of 
> *James Hansen
> *Sent:* Wednesday, December 15, 2010 9:59 AM
> *To:* equest-users at lists.onebuilding.org 
> <mailto:equest-users at lists.onebuilding.org>
> *Subject:* [Equest-users] heat recovery and zone exhaust
> I'm having the typical issues with getting an enthalpy wheel to show 
> appreciable savings.  I've adjusted some of the control sequences, and 
> have managed to show a savings in cooling energy, but I'm getting no 
> heating savings, which is strange, unless my building is actually 
> asking for cold OA during the winter because of the rather large 
> internal heat loads (my guess is that this is true).
> My question is whether you HAVE to define zonal exhaust airflow rates 
> to properly show the savings from heat recovery, or if the program 
> knows that the exhaust will roughly match the OA delivered to the 
> space?  Do I have to turn on exhaust tracking?
> *GHT Limited
> **James Hansen, PE, LEED AP*
> *Senior Associate*
> 1010 N. Glebe Rd, Suite 200
> Arlington, VA22201-4749
> 703-338-5754 (Cell)
> 703-243-1200 (Office)
> 703-276-1376 (Fax)
> www.ghtltd.com <http://www.ghtltd.com/>
> **
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