[Equest-users] app g economizer

[Andy Phelps]

I think for the purposes of App G, the answer is airside.  90.1 does
differentiate between air and water economizers:

 

economizer, air: a duct and damper arrangement and automatic

control system that together allow a cooling system to

supply outdoor air to reduce or eliminate the need for mechanical

cooling during mild or cold weather.

 

economizer, water: a system by which the supply air of a cooling

system is cooled indirectly with water that is itself cooled

by heat or mass transfer to the environment without the use of

mechanical cooling.

 

Haven't seen a CIR that addresses this, though.

 

 

Andy Phelps, PE, LEED AP | BARNES & DODGE, INC. |
aphelps at barnesanddodge.com | (o) 913-321-6444 | (c) 913-710-7915 | 

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From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
Dahlstrom, Aaron
Sent: Friday, April 15, 2011 2:35 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] app g economizer

 

A simple Q -  

 

Does everyone agree that the App G baseline building is supposed to have
an air-side economizer (in the mentioned climates)?

 

There are some buildings where architectural choices make it difficult
to accommodate an air-side economizer.

 

Nonetheless, Section G3.1.2.6 appears to require modeling specifically
an air-side economizer for the baseline

 

I am thinking it could be a bit ambiguous depending on what you think
"outdoor air economizer" means. 

 

Has anyone seen interpretations clarifying this one way or the other?

Or submitted a CIR to allow water-side economizers in the baseline where
that is the industry standard for the building type?

 

THANKS,

 

Aaron Dahlstrom , PE, LEED(r) AP

In Posse - A subsidiary of AKF| 1500 Walnut Street, Suite 1414,
Philadelphia, PA 19102 

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

 

 

 


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