[Equest-users] Different operation schedules for ventilationsystem

[Dakota Kelley]

Any fan in a non-conditioned space is considered a process load and must be modeled identically in both cases.  This applies to parking garage fans, unconditioned warehouse ventilation fans, mechanical/electrical exhaust, etc.  Like Nick indicated, taking credit for nonstandard efficiency measures requires the modeler to demonstrate that the measure is nonstandard.  Many U.S. codes require some sort of automatic control measure for these types of fans, so it’s very difficult to claim that a timer, thermostat, or carbon monoxide sensor is nonstandard.  Outside the U.S. may be a different case, but I would be prepared to provide the relevant section of the local code.

 

                                 

DAKOTA KELLEY 

Project Designer | Energy Analyst

                          

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From: Nick Caton [mailto:ncaton at smithboucher.com] 
Sent: Wednesday, October 13, 2010 8:40 AM
To: Mohammad Almasri; eQUEST-users at onebuilding.org
Subject: Re: [Equest-users] Different operation schedules for ventilationsystem

 

Schedules generally should be identical between baseline and proposed – if you modify one you should modify the other in the same fashion.  

 

What is your justification to do something different?  90.1 has provisions to alter schedules when necessary to demonstrate nonstandard energy efficiency measures – see Table G3.1.4.

 

~nick

 

 

 

NICK CATON, E.I.T.

PROJECT ENGINEER

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direct 913 344.0036

fax 913 345.0617

Check out our new web-site @ www.smithboucher.com 

 

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Mohammad Almasri
Sent: Wednesday, October 13, 2010 5:07 AM
To: eQUEST-users at onebuilding.org
Subject: [Equest-users] Different operation schedules for ventilation system

 

 

Dear All, 

 

Is it allowable ,based on the ASHRAE appendix G and LEED NC, for exhaust fans in the non conditioned areas to operate with a schedule different from the baseline schedule? I have a jet and exhaust fans for non conditioned area , but those fans will operate in accordance to a programmable timer (on-off).

 

 

 

 

 

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