[Equest-users] [eQuest users] packaged variable volume system

[Jeremy McClanathan]

The first thing I would check is simultaneous heating and cooling.  If it is a problem, check the reset temps and controls of the packaged system.  The packaged unit may be cooling the air, then tempering it at the zone level.

___________________________________________

Jeremy McClanathan, LEED(r) AP
CDi ENGINEERS
4200 194th St SW, Ste 200, Lynnwood, WA 98036
P 425-672-1071 | F 425-778-8769
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From: Tomlinson, Scott [mailto:stomlinson at smma.com]
Sent: Tuesday, March 02, 2010 8:42 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] [eQuest users] packaged variable volume system

I have a question regarding HVAC system types in eQuest.  My baseline building is modeled as a packaged variable volume system (It is a System 5) while my design building is mostly modeled as a bunch of packaged single zone systems.  For some reason I am getting a 70% reduction in gas consumption, even thought my efficiencies are pretty similar.  This reduction seems unreasonable.  Is there something about the packaged variable volume system  in eQuest that I don't know about?  What type of system do people usually use for a system 5?


-          Thanks,

__________________________________________

Scott Tomlinson, PE, LEED-AP

Mechanical

Symmes Maini & McKee Associates, Inc.

1000 Massachusetts Avenue, Cambridge, MA 02138

t: 617.520.9438

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f: 617.354.5758

stomlinson at smma.com<mailto:STomlinson at smma.com>

www.smma.com<http://www.smma.com/>




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