[Equest-users] Fedx

Jeremy Poling Jeremy.Poling at transwestern.net
Thu Mar 3 13:12:53 PST 2011


Richard,

 

First check against the definitions of "space" on page  13.  If the
rated capacity of the heating units for the space is between 3.4 Btuh/SF
and the value in Table 3.1 for your climate zone, then your warehouse
space is considered a semi-heated space and is not subject to the
requirement to model a cooling system in the baseline.

 

For the question on number of systems, what you're looking is under
G3.1.1: "For systems 5, 6, 7, and 8, each floor shall be modeled with a
separate HVAC system."  That would mean a single system for the entire
warehouse portion of the building and the offices (unless you claim an
exemption for the offices due to G3.1.1.a, G3.1.1.b, G3.1.1.c, or
G3.1.1.d).  Then note any requirements for system 5 from the latter
portions of appendix G.

 

Jeremy R. Poling, PE, LEED AP+BDC



 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
RJTHEACMAN at aol.com
Sent: Thursday, March 03, 2011 11:48 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Fedx

 

  

I am modeling a 110,000 sf. Fedex sorting facility for LEED and the
building has a small office area that is heated and cooled by rooftop
units and the remainder of the warehouse is only heated.

 

In accordance with ASHRAE 90.1 2007 if no cooling system exists the
cooling system shall be identical to the system modeled in the baseline
building design.

 

That system is a system 5 packaged vav with reheat, which includes a hot
water boiler. 

 

We have (15) gas-fired unit heaters that provide heat to the warehouse.

 

My question is do I set up my heating system with 15 hot water boilers,
the same heating capacity as the unit heaters?

 

For the fan energy, do I set my air quantity the same as my unit
heaters?

 

How do I address the VAV portion of the system as well as the hot water
pumps?

 

I have my model setup with (2) separate HVAC systems (1) Packaged VAV
with Reheat and (2) Packaged rooftop DX units with a gas furnace.

 

Any help will be greatly appreciated.

 

Richard Dominick, P.E.

TEC Engineers, LLC.

Norwalk, CT.

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