[Bldg-sim] Actual HVAC Heat Load Calculations Vs Heat LoadCalculations as per LEED

Seth P. Spangler sspangle at rmf.com
Thu Jul 1 04:42:31 PDT 2010


Ashraf,

 

There have been several discussions on this topic before so you might do
a quick search if you need more in-depth background information. The 25%
is actually more of a guidance number and is what is typically expected
for an office building here in the US. There is nothing in LEED that
states you can't be less than 25% - you just have to document why and
submit it along with the EAc1 template. The 25% is also a suggested
minimum number - not a maximum. Long story short - you should model your
building as it will be operating - this includes the process loads. If
you building has greater than 25% process load then you don't need to do
anything else. If it is less then you will need to submit additional
documentation.

 

Seth Spangler, LEED(r) AP 

 

RMF Engineering, Inc 

Ph: (843) 971-9639 ext:1497

Fax: (843) 971-9641 

sspangle at rmf.com

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Ashraf Khan
Sent: Thursday, July 01, 2010 6:10 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Actual HVAC Heat Load Calculations Vs Heat
LoadCalculations as per LEED

 

Hi,

 

For LEED Energy Modeling generally we consider software of DOE, EQUEST,
TRANE, HAP etc..

 

To design a Heat load calculations for HVAC generally considered the
exact load in the Building and to comply for LEED Requirements of EAC1 -
Optimized Energy Performance we need to consider 25% of Process Load
cost which is much less. 

Cooling load will be different when we compare between Actual Heat Load
and the Heat Load as per LEED. I hope I'm correct.

 

I received a comment from LEED Reviewer, that "Proposed model should
reflect all the HVAC equipment in the actual design at actual component
capacities" 

 

Please guide me how to model in Propose Design. 

 

Thanks & Regards,

Ashraf

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