[Equest-users] LEED Baseline system
Dakota Kelley
dakotak at teliospc.com
Thu Jul 15 10:10:02 PDT 2010
Ana,
You are correct. It is not explicitly stated in 90.1, but a floor with conditioned space is a floor regardless of whether it is above or below grade. “Basement” is too vague of a term in this context. To give you an example, I had a project that was five floors above grade and one floor below grade. The below grade floor was 50% fully-conditioned space (labeled “basement” storage on the plans) and 50% parking garage. The building area was about 135,000 SQFT gross (with the garage), 120,000 SQFT without the garage, and 97,000 SQFT if the entire below grade floor was excluded. So, the area component was irrelevant; baseline selection came down to System 6 if I counted it as five floors and System 8 if I counted the below grade floor. I counted the below grade floor and went with System 8, and the LEED reviewer drove to my office and gave me a high five, a low five, and an on-the-side five. Then she made me clarify how I calculated my fan power allowance.
DAKOTA KELLEY
Project Designer | Energy Analyst
Office: 214.744.6199
Cell: 214.280.3825
Fax: 214.744.0770
http://www.teliospc.com <http://www.teliospc.com/> 3535 Travis St. Suite 115
dakotak at teliospc.com Dallas, TX 75204
| MEP ENGINEERING · ENERGY MODELING · LEED CONSULTATION · COMMISSIONING |
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From: Ana N. [mailto:ananeddav at hotmail.com]
Sent: Thursday, July 15, 2010 10:45 AM
To: demba.ndiaye at setty.com; Dakota Kelley; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] LEED Baseline system
The ASHRAE definition of "story" led me think that the basement should not be included in the total number of floors. However, Appendix G indicates that for systems 5,6,7 and 8 each floor shell be modeled with a separate system. That being said, if i had four floors plus basement , I would model 5 systems since my basement is conditioned. This approach would be more in line with what Dakota said. Thank you both for your suggestions. Obviously, Appendix G is not clear about this.
________________________________
From: Demba.Ndiaye at setty.com
To: dakotak at teliospc.com; ananeddav at hotmail.com; equest-users at lists.onebuilding.org
Date: Tue, 13 Jul 2010 15:34:48 -0400
Subject: RE: [Equest-users] LEED Baseline system
Read “floor” as “story” and you can see the definition of that term in the Standard (Section 3). Basement is specifically excluded. So in the present case, you fall in System 3 or 4.
_____________
Demba NDIAYE
From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Dakota Kelley
Sent: Tuesday, July 13, 2010 2:11 PM
To: Ana N.; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] LEED Baseline system
If it is conditioned space (heated, cooled, or both), a basement floor is still a floor as far as system selection is concerned. If it is neither heated nor cooled, it might be acceptable to exclude it, but I admit I have never encountered an entirely unconditioned basement on a LEED project before.
DAKOTA KELLEY
Project Designer | Energy Analyst
Office: 214.744.6199
Cell: 214.280.3825
Fax: 214.744.0770
http://www.teliospc.com <http://www.teliospc.com/> 3535 Travis St. Suite 115
dakotak at teliospc.com Dallas, TX 75204
| MEP ENGINEERING · ENERGY MODELING · LEED CONSULTATION · COMMISSIONING |
CONFIDENTIALITY NOTICE: This email is intended only for the use of the individual or entity to which it is addressed,
And may contain information that is privileged, confidential and exempt from disclosure under applicable law. If you
are not the intended recipient, please email the sender immediately, and delete this email from all computers. Any
distribution or other use is strictly prohibited. Copyright © 2009 Telios Corporation.
From: Ana N. [mailto:ananeddav at hotmail.com]
Sent: Monday, July 12, 2010 5:39 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] LEED Baseline system
Hi All,
My understanding is that the basement should not be counted toward the total number of floors when selecting the baseline HVAC system type (Table G3.1.1A). My building has three stories plus basement and total conditioned floor area of 20,600 sf ( sf does not include attic which is about 5,000sf). I would select PSZ-AC for hybrid or PSZ-HP for electric heat. Am I correct?
Any comments are appreciated.
Thank you.
Ana
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