[Equest-users] Sizing of equipment

Brahme, Rohini UTRC BrahmeR at utrc.utc.com
Tue Jan 13 08:25:06 PST 2009

Check for reverse acting thermostat, or make sure that your min-air flow
for heating is sufficient.



From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
Kairento, Janne
Sent: Tuesday, January 13, 2009 11:03 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Sizing of equipment


Hey All,


I am running a load with many zones on 5 floors totaling over 300 zones.
There are some zones with many unmet hours, some of the core, some
perimeter. I went in and changed the sizing ratio of these zone to
reduce the unmet heating hours. I am modeling this building with 9
AHU's, all VAV w/ reheat. Does anyone have any insight or suggestions on
why or how these unmet hrs. exist. I have changed the hot water loop
flow GPM but it had no effect on the unmet heating hrs. so I deduced
this is not the cause. 


Janne Kairento, E.I.T., LEED AP  
Cosentini Associates 
One Broadway 
Cambridge, MA 02142 
Phone: 617.494.9090 
Fax:  617.494.9292 

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