[Equest-users] Typical assumptions for Mechanical Room exhaust

[James Hansen]

I always set up a separate heating and cooling schedule for mechanical
rooms in garages (as an example).  Cooling setpoint is 120 degrees for
all hours, heating setpoint is 45 degrees for all hours.  Set it up as a
PSZ system, with EIR meeting minimum requirements of 90.1 even though it
will never be in cooling mode.

 

GHT Limited
James Hansen, P.E., LEED AP
Senior Associate
1010 N. Glebe Road, Suite 200
Arlington, VA  22201-4749
703-243-1200 (office)

703-338-5754 (cell)
703-276-1376 (fax)

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

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Ramana
Koti
Sent: Tuesday, December 20, 2011 11:30 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Typical assumptions for Mechanical Room exhausts

 

Dear All,

 

Specifically for energy models for LEED EAc1, what are typical
assumptions for operation of mechanical room exhaust? The mechanical
rooms in a project I'm dealing with have freeze protection heating only
but as per LEED spaces that are heating or cooling only have to be
modeled as both heating and cooling. For example, one of the mechanical
rooms has 8000 CFM of exhaust and zero Outside Air CFM. How does one
model for accurate representation yet keep the loads from ballooning
disproportionately in such a situation?

 

Thanks,

Ramana Koti.



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