[Equest-users] Toilet Exhaust

Dahlstrom, Aaron ADahlstrom at in-posse.com
Thu Oct 6 09:08:19 PDT 2011


Omar - where is the air coming from that makes up the exhaust?

This affects how I would model toilet exhaust.

Aaron Dahlstrom , PE, LEED® AP
In Posse - A subsidiary of AKF| 1500 Walnut Street, Suite 1414, Philadelphia, PA 19102
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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Omar Katanani
Sent: Thursday, October 06, 2011 11:15 AM
To: eQUEST Users List
Subject: [Equest-users] Toilet Exhaust

Dear all,

I would like to double check with you if I'm modeling my toilet exhaust correctly, in order to answer the USGBC's design review comments properly!

>       The project has exhaust fans on the roof, with ducts to each toilet (i.e., ducted exhaust).
>       Since the toilets are not conditioned, I'm placing them arbitrarily under random AHUs.
>       I am then entering the exhaust flow rate and the kW per flow as in the attached screenshot.

1.       Can someone please confirm that the above is correct?
2.       I assume ASHRAE 90.1 App G3.1.2.9 (baseline fan power corrections) applies for toilet exhausts. I think I'll have to use the correction factors for the
      "Fully ducted return and/or exhaust air systems" (125 Pa). I'll plug in the resultant kW/cfm in the input box in the attached drawing. Correct?

Many thanks,
Omar
___________________________
Omar Katanani
Sustainable Design Engineer
Email: omar at ecoconsulting.net<mailto:omar at ecoconsulting.net>

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