[BLDG-SIM] LEED & Laboratory exclusion

[Taylor, Russell D UTRC]

John,
 
Having simulated a number of laboratory buildings for LEED NC 2.1, I
don't see any way around the inclusion of the 'process spaces' in your
ECB analysis. LEED  NC 2.1 does let you subtract out the plug/process
loads when calculating the percentage energy reduction versus the ECB
baseline, but I'm guessing that your building has a high ventilation
load combined with large static pressures on supply and exhaust fans
that are driving the energy consumption of the building. Unfortunately,
the CIR's that have been answered on this issue are pretty clear that
you cannot exclude these spaces from the ECB analysis. 
 
The way to mitigate this issue is look very carefully at the fan power
of the building design and, in particular, the fan power credits allowed
under 6.3.3.1. Take as much credit in the baseline for supply
temperature, filtration, and heat recovery as you reasonably can. In
addition, perform a rigorous calculation of the fan power requirements
of your design. In many buildings of this type, fan power gets grossly
oversized. One project I worked on was calling for 9 in. w.g.. of static
on the lab system supply fans. After a more careful analysis, the MEP
concluded that they only needed about 6 in. w.g.. static to satisfy
their airflow requirements.
 
Other aspects of 90.1-1999 to pay particular attention to are sections
6.3.6 and 6.3.7 on energy recovery and exhaust hoods respectively.
 
Russell Taylor
________________________________________________________________________
_______ 

Russell D Taylor, Ph.D. 
UTRC | 411 Silver Lane, MS 129-85 | East Hartford, CT 06108 | Ph: (860)
610-7485 
________________________________________________________________________
_______ 

 

________________________________

From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of
Peterson, John
Sent: Monday, June 11, 2007 1:10 PM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] LEED & Laboratory exclusion



Has anyone managed to exclude interior laboratory spaces from LEED
evaluations?  We have a project under LEED 2.1 where we would like to
not include the interior process spaces.  Having them included would
detract from energy, materials, water use reduction, lighting and
ventilation credit requirements.  Any direction on discussion would be
greatly appreciated. 

Thanks in advance - 

John

 

John Peterson, PE, LEED AP

R.G. Vanderweil Engineers, LLP 

625 N. Washington Street     Alexandria, VA  22314-1913 

Tel: (703) 683-9700 

Fax: (703) 683-2480 

www.vanderweil.com <http://www.vanderweil.com>  

 

 


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