[Bldg-sim] Exhaust Fans in Baseline

[Demba Ndiaye]

Exhaust fan power is to be the same for both designs. You apportion the remaining baseline fan power allowance between supply and return/relief.

______________
Demba NDIAYE

From: Vinay Devanathan [mailto:vinay.devanathan at gmail.com]
Sent: Thursday, July 08, 2010 5:29 PM
To: Sami, Vikram
Cc: Demba Ndiaye; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Exhaust Fans in Baseline

Vikram,

Thanks for your reply.

So, does it mean I will have to model the exhaust fan in the baseline model but in a fashion such that it consumes power proportionate to your proposed design (supply, return and exhaust) but falls within the Allowable Fan System bhp value of Appendix G. Am I right?

Thank you.

Regards,
Vinay
On Thu, Jul 8, 2010 at 5:23 PM, Sami, Vikram <Vikram.Sami at perkinswill.com<mailto:Vikram.Sami at perkinswill.com>> wrote:
I'm pretty sure that your fan power allowance in 90.1 is for all fan energy (including exhaust). So for example if your baseline fan allowance is 20kW (hypothetical), you will need to apportion that allowance between supply and exhaust similar to your designed building.

There was an extensive discussion about this around a year ago on this list (check the archives).

Vikram Sami, LEED AP
Sustainable Design Analyst
1382 Peachtree St. NE, Atlanta, GA 30309
t: 404-443-7462    f: 404.892.5823       e: vikram.sami at perkinswill.com<mailto:vikram.sami at perkinswill.com>   www.perkinswill.com<http://www.perkinswill.com/>
Perkins+Will.  Ideas + buildings that honor the broader goals of society


From: bldg-sim-bounces at lists.onebuilding.org<mailto:bldg-sim-bounces at lists.onebuilding.org> [mailto:bldg-sim-bounces at lists.onebuilding.org<mailto:bldg-sim-bounces at lists.onebuilding.org>] On Behalf Of Vinay Devanathan
Sent: Thursday, July 08, 2010 5:15 PM
To: Demba Ndiaye
Cc: bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>
Subject: Re: [Bldg-sim] Exhaust Fans in Baseline

Demba,

Thanks for your quick reply.

Regards,
Vinay
On Thu, Jul 8, 2010 at 5:13 PM, Demba Ndiaye <Demba.Ndiaye at setty.com<mailto:Demba.Ndiaye at setty.com>> wrote:
Vinay,

It is required to also model the exhaust fans in the Baseline. Use same cfm and fan powers as in the Proposed.

______________
Demba NDIAYE

From: bldg-sim-bounces at lists.onebuilding.org<mailto:bldg-sim-bounces at lists.onebuilding.org> [mailto:bldg-sim-bounces at lists.onebuilding.org<mailto:bldg-sim-bounces at lists.onebuilding.org>] On Behalf Of Vinay Devanathan
Sent: Thursday, July 08, 2010 5:09 PM
To: bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>
Subject: [Bldg-sim] Exhaust Fans in Baseline

Hello All,

Do we have to model the exhaust fans also according to Appendix G for a Baseline model?
If yes, how should we design the cfm?

Thank you very much.

Regards,
Vinay


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