[Equest-users] LEED Review Comment - Exhaust Fans

[Nick Caton]

Omer,

I would concede with the reviewer's first point and modify the proposed model to match the scheduled fan capacities.

To the second point of modeling exhaust systems additionally/separately in the baseline, I believe one can feasibly construct a case to support either position, but I would personally probably disagree with the reviewer and their reference to TG3.1.10 in the case of an exhaust fan system.  

The term "independent fan systems" is an abstraction that is confusing the issue.  I speak directly to this in the attached discussion, and would likely refute that choice of words on principle - I suspect you might have the same reviewer.

On that note, I would strongly suggest reviewing the attached recent discussion carefully from the beginning, regarding these same sections and how they may apply (or not) to baseline/proposed models. The discussion tangents a good deal, but it will be useful to see others' understanding/practice of how these sections apply.

~Nick

NICK CATON, P.E.
SENIOR ENGINEER

Smith & Boucher Engineers
25501 west valley parkway, suite 200
olathe, ks 66061
direct 913.344.0036
fax 913.345.0617
www.smithboucher.com 


-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Ömer Moltay
Sent: Monday, June 13, 2011 8:16 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] LEED Review Comment - Exhaust Fans

Dear All,

We have received the following from GBCI regarding the energy modelling
review:

"Table1.4.2 indicates that exhaust fan systems are reflected in the Proposed model; however, the equipment capacities are inconsistent with the exhaust fan systems (EF-1 through EF-9) as indicated in the mechanical schedules provided for PI Form 4: Schedule and Overview Documents. In addition, the independent fan systems of the HVAC systems in the actual design must be modeled identically between the Proposed and Baseline models at actual equipment capacities (fan volume and fan power) as required by Table G3.1.10 in the Proposed building column, since the fan design air flow rates and fan power per Sections G3.1.2.8 and G3.1.2.9, respectively, only applies to system types 1 through 8 in Table G3.1.1A. 
Revise the
Proposed and Baseline models so all independentfan systems of the HVAC systems are modeled identically between the Proposed and Baseline models. In addition, separate the energy consumption and peak demand energy for independent#fans in Table EAp2-4 and Table EAp2-5 of the prerequisite form. Further,provide revised SV-A reports reflecting the changes"

Our proposed model has supply and exhaust fans (Supply: AHU, FCU -
Exhaust: AHU, independant exhaust fans). Our baseline model has supply and relief fans (VAV System).

Please look at Section 6 of the attached Table 1.4.2. Are we expected to additionally model exhaust fans in the baseline case? Do they mean exhaust fans when they say "independent fan systems of the HVAC systems?".

Thanks for all replies,

Omer Moltay, LEED AP BD+C, BREEAM Assessor Mimta Ltd.
Hekimsuyu Cad. 559. Sk. No:39
34255 Kucukkoy Istanbul Turkey
Tel: 90-212-617-2296
Fax: 90-212-617-2297
www.mimtarch.com
www.mimtasolar.com
www.eko-yapi.net

Sürdürülebilir Binalar Blog
http://surdurulebilirbina.blogspot.com

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http://www.linkedin.com/groups?gid=2278249

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