[Bldg-sim] Appendix G additional system types

[Nick Caton]

Hi Bill,

 

Assuming you are treating your building as predominantly residential,
then include a second nonresidential system type if nonresidential
spaces total more than 20,000SF.  

 

Assuming you are treating your building as predominantly nonresidential,
then include a second residential system type if residential spaces
total more than 20,000SF.  

 

"Residential spaces" are exclusively "guest rooms, living quarters,
private living space, and sleeping quarters" per the notes under the
system type table.  Laundry rooms and similar don't count, if the
reviewer is taking a very literal interpretation.

 

This is one of those cases where you could possibly support either
course of action... if the numbers work out.

 

~Nick

 

 

NICK CATON, P.E.

SENIOR ENGINEER

 

Smith & Boucher Engineers

25501 west valley parkway, suite 200

olathe, ks 66061

direct 913.344.0036

fax 913.345.0617

www.smithboucher.com 

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Bishop,
Bill
Sent: Friday, June 17, 2011 9:29 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Appendix G additional system types

 

I modeled a residence hall on a college campus using ASHRAE 90.1-2004
Appendix G System Type 1 - PTAC, with a system per zone. I received the
following comment from the LEED Reviewer:

"Section G3.1.1 states that additional system type(s) should be used for
the non-residential space types (including corridors, classrooms,
lounges, public living rooms, etc.). The notes at the end of Table
G3.1.1A identify which spaces are considered residential."

The referenced note states, "Residential space types include guest
rooms, living quarters, private living space, and sleeping quarters.
Other building and space types are considered nonresidential."

 

There is 4,000 ft2 of classroom and conference room space. If I include
corridors, common living rooms, lobby, mech/elec/data, stairwells,
storage, common bathrooms and laundry, I would exceed the 20,000 ft2
threshold condition of the G3.1.1 exception.

The example given in the User's Manuals as a qualifying exception is "a
residential tower with retail and restaurants at the base". 

 

Does anyone think this necessitates additional system types? (System 3
presumably, one per zone.)

 

Thanks,

Bill

 

 

 

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