[Bldg-sim] LEED & Natural Ventilation

[Rimes, Christie]

I am currently doing a naturally ventilated building for LEED and I
believe that if the space is achieving indoor temperatures between the
given set point using natural ventilation than the mechanical system
energy is 0 for the proposed design. Any hours where natural ventilation
can't achieve indoor temperatures within the set points, a mechanical
system needs to be modeled even if there isn't one in the proposed
building. This helps keep the unmet hours within the requirements for
LEED.

 

Cheers,

 

 

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Chris
Sent: Thursday, July 29, 2010 11:13 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] LEED & Natural Ventilation

 

All,

 

we regularly design and model buildings which rely in part on natural
ventilation as a source of free cooling. The issue we are often faced
with is how to capture this benefit when performing a LEED Appendix G
analysis. Appendix G states that all conditioned spaces must have BOTH
heating and cooling. We would like to remove mechanical coolig in the
proposed design building and thus gain benefit when comparing to the
mechanical cooling system in the reference baseline building.

 

Has anyone tackled this issue and come to a satisfactory resolution? 

 

Thanks for your help.



-- 
Chris Flood BSc (Eng)
Senior Building Analyst & Energy Modeller

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