[Bldg-sim] Apendix G3.1.2.9

[Kimberly Killian]

Gregg,
Is there guidance on what portion of the Pfan goes to each? What percentage goes to supply, what percentage to return, etc?
Kimberly Killian
Northern Architects, Inc.
207 King Street Suite 3
Burlington VT 05401
T: 802-658-1953
F: 802-658-2975


Original message
From: "Gregg Liddick" 
To: syedf at progressiveae.com; bldg-sim at lists.onebuilding.org
Received: 3/23/2010 5:24:39 PM
Subject: Re: [Bldg-sim] Apendix G3.1.2.9

No, you use only the fan supply cfm to calculate the total fan power, then cut that fan power up into supply, return, etc.

Best Regards,
Gregg Liddick, EIT, LEED® AP 
The Epsten Group, Inc. 
429 Edgewood Avenue 
Atlanta GA 30312 
Phone: 404-577-0370  ext. 102 
Fax: 404-577-1739 
www.theepstengroup.com 
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From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Fareed Syed
Sent: Tuesday, March 23, 2010 5:11 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Apendix G3.1.2.9
Hello All,
I am trying to understand the stated appendix for the baseline model. 
When I am calculating the Pfan for a system, do I need add up supply, return, system and room exhaust cfm’s? 
I got this comment from GBCI: “Revise the sum of the supply, return, exhaust, and relief fans for each HVAC system to be equal to the volume calculated in G3.1.2.8 and power calculated in G3.1.2.9 (where CFM refers to supply air volume).” 

Please let me know your input on how to calculate Pfan.

Thanks,
Fareed Syed EIT, LEED® AP
Mechanical Engineer 
 
1811 4 Mile Rd NE
Grand Rapids, MI  49525
Phone: 616.361.2664 ext. 3247
Direct: 616.447.3447
Fax: 616.361.1493 
syedf at progressiveae.com
www.progressiveae.com

   
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