[Equest-users] Baseline scenario - Outdoor minimum air flow

Jeff Seger Jeff.Seger at megroup.com
Wed Sep 22 10:45:15 PDT 2010


In addition to what Carol said, make sure you keep Sections G3.1.2.5 and G3.1.2.8 in mind.  Of course, G3.1.2.5 only refers to Ventilation air, but the way I interpret that is that I keep airflows in my baseline and proposed models the same.

I'm not too fond of G3.1.2.5, because I immediately think of designers who want to meet the increase ventilation Credit in LEED.  The increased ventilation obviously causes an increased load on the system that would not be there otherwise (i.e. in a "baseline" case).  So I personally feel that if a project is pursuing that credit, the baseline model should be based on 62.1 requirements, and the proposed model should include OA quantities as designed.  Regardless of how I feel, I still follow the Standard.

 If anyone has any insight as to why ASHRAE maintains this position, please let me know...I'm curious as to why :)

Jeff Seger  EI
M.E. GROUP / design + green
t: 816.531.2121 x3123
c: 314.623.5170
[cid:image002.jpg at 01CB5A54.013033C0]<http://www.megroup.com/>

From: Carol Gardner [mailto:cmg750 at gmail.com]
Sent: Wednesday, September 22, 2010 11:30 AM
To: Omar Katanani
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Baseline scenario - Outdoor minimum air flow

Welcome back, Omar. For the baseline building leave it blank.

On Wed, Sep 22, 2010 at 9:05 AM, Omar Katanani <omar at ecoconsulting.net<mailto:omar at ecoconsulting.net>> wrote:
Dear all,

It's been a while! I was busy with company work other than thermal modeling...

ASHRAE 90.1-2007 states that the VAV Minimum Flow Setpoint shall be 0.4CFM/ft2. I have put this in the zone air flow tab as in the picture attached (can you please check it?). However, the design value of the air flow is 2,800 CFM. Equest allows me to enter this value or leave it blank.

For the baseline modeling, shall I enter 2800 or leave it default blank?

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

EcoConsulting (Lebanon)
Nahas Building, 4th floor
4 St-Maron Street / Georges Haddad Avenue
Postal Code: 2028 5806 SAIFI
Beirut, Lebanon
Tel:          +961 (0) 1 971 266
Mobile:    +961 (0) 3 045 045

EcoConsulting (UK) Ltd
28 Marshalsea Road
London, SE1 1HF
Tel:  +44 (0) 207 939 0989
Fax:  +44 (0) 207 939 0981
Website: www.ecoconsulting.net<http://www.ecoconsulting.net/>

 [cid:image001.jpg at 01CB5A52.1421F920]

Equest-users mailing list
To unsubscribe from this mailing list send  a blank message to EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG<mailto:EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG>

Carol Gardner PE

CONFIDENTIALITY NOTICE: This e-mail and any attached file(s) are intended only for the use of the individual or entity to whom or to which it is addressed and may contain information that is privileged, confidential, proprietary, and trade secret. If the reader of this message is not the intended recipient or an employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution, or reproduction of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately and discard the original message and any attachment(s).
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20100922/2b111d3a/attachment-0002.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 27542 bytes
Desc: image001.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20100922/2b111d3a/attachment-0004.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 11807 bytes
Desc: image002.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20100922/2b111d3a/attachment-0005.jpg>

More information about the Equest-users mailing list