[Equest-users] Equest v3.64 - Plenum and Zones

[Charles Land]

Floor to ceiling height 6 inches?  The floor to floor height is the height of your floor.  Then the floor to ceiling height is the height of your conditioned space.  The plenum height is the your floor to floor minus your floor to ceiling.   Not only that if your shortening your building and not putting in your plenums wouldn't that decrease your solar load on the building.  True your plenum is unconditioned, but wouldn't part of that solar load into the plenum then transfer into your space.  And also if you are making your floor to floor height correct and then not entering a plenum wouldn't you then be conditioning a larger volume.

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Carol Gardner
Sent: Thursday, September 02, 2010 12:10 PM
To: Bishop, Bill
Cc: EQuest
Subject: Re: [Equest-users] Equest v3.64 - Plenum and Zones

Here's my answer: don't create plenums. Why would you want them unless you are doing a UFAD system and that's a whole other story, or wholenother or whatever. I just make my floor to floor height one number and my floor to ceiling height 6 inches, or the width of the floor slab, less. The DOE help manual, you know, has always suggested that you don't need to model plenums. It seems like it would save a lot of people a lot of time, space, and heart burn to just not include them.

Cheers,
Carol
On Thu, Sep 2, 2010 at 8:37 AM, Bishop, Bill <wbishop at pathfinder-ea.com<mailto:wbishop at pathfinder-ea.com>> wrote:
Mike,

The eQUEST wizard will create plenums based on the inputs for systems. For example, if you use the Schematic Design Wizard and select a VAV system, you will get one plenum per floor. If you select Packaged Single Zone you will get one plenum per zone. If you use the Design Development Wizard, you have the option of selecting System per Floor or System per Zone, which will create the plenums accordingly.

Regards,
Bill

William Bishop, PE, BEMP, LEED(r) AP | Pathfinder Engineers & Architects LLP
Mechanical Engineer

134 South Fitzhugh Street
Rochester, NY 14608
T: (585) 325-6004 Ext. 114
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wbishop at pathfinder-ea.com<mailto:wbishop at pathfinder-ea.com>
www.pathfinder-ea.com<http://www.pathfinder-ea.com>
P Sustainability - less is more.
________________________________
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 Mike Schaefer
Sent: Thursday, September 02, 2010 8:49 AM
To: EQuest
Subject: [Equest-users] Equest v3.64 - Plenum and Zones

After setting up an overall buidling footprint and then the zones eQuest creates a large plenum that encompasses all zones. How can I divide this plenum to correlate to it's respective zone? When I have mutlipy systems I'm forced to assign the plenum return to one system instead of the related zones.

I'd appreciate any input. Thanks,

Michael Schaefer - P.E., LEED(r) AP


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--
Carol Gardner PE
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