[Equest-users] LEED review comments for System 5 heating source

[Paul Diglio]

Lan:

90.1-2007 requires a system 5 with a fossil fuel hot water boiler as you have 
modeled, but in 90.1-2007 Table G3.1 Number 10 HVAC Systems Base Building 
Performance column it states that you need to meet any system-specific 
requirements in Section G3.1.3.

In G3.1.3.2, it states that for system 5, the boiler plant shall use the same 
fuel as the proposed design, which in your case is electric resistance and 
compressor heat pump energy.  I would model electric hot water boilers.

Paul Diglio




________________________________
From: "Li, Lan" <lli at sbmce.com>
To: equest-users at lists.onebuilding.org
Sent: Thu, June 30, 2011 4:24:27 PM
Subject: [Equest-users] LEED review comments for System 5 heating source

 
Dear eQuesters,
 
I just got LEED review comments for my project. Our proposed design is VRF 
system with roof top unit providing ventilation air. Roof top unit is using gas 
as heating source. There are misc. elec. heaters in the building for places like 
entries. I interpreted my building heating source as “electric hybrid” and used 
hot water fossil fuel boiler as my base design. The comments I got read as the 
follows:
Section 1.1.A of the form indicates that the primary heating source is fossil 
fuel. However, the electric heating energy use reported in Table EAp2-5 for the 
Proposed Case exceeds the fossil fuel heating energy use. Please verify that the 
correct heating source has been selected. If electric heating is the primary 
heating source, please change the Baseline system type accordingly. Provide 
updated simulation results and a revised Prerequisite Form as necessary.
I couldn’t find an official definition either on LEED reference book or 90.1. 
What is your take on this?
Your input is highly appreciated! Thank you very much!
Lan
 
 
 
Lan Li, PE, LEED AP BD+C
Mechanical Engineer
Scheeser Buckley Mayfield LLC                                    
1540 Corporate  Woods Parkway
Uniontown, OH 44685
Phone: (330) 896-4664 ext. 123
Fax: (330) 896-9180
Cell:(330) 904-6292
 
lli at sbmce.com
www.sbmce.com
 
ColumbusOffice (614) 448-1498
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Thank you
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