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Forum discussion

CS-2009 EAp2:Minimum Energy Performance

Process Load of a factory applying LEED CS

I have a factory to be built for rent. Thus, this project goes for CS since we only build the shell. However, since we don't know the detail of a machine to be used (depend on the future tenant/customer). How should we model the process load for this factory? We have tried ASHRAE 90.1 user manual but it seem too low (0.25 W/sf). We afraid that the reviewer might not accept this baseline. Any documents or interpretation we should follow?

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Tue, 03/31/2015 - 15:07

I am not aware of a source of this data you could use which would automatically be accepted by the reviewer. The values in the User's Manual are just minimum base load values (see the note at the bottom of the table). I agree that you should be using a much higher value. I assume that the general type of manufacturer would be known and if so you could develop an estimate of the process load based on the expectation of the type of tenant expected. In the absence of any specific information I would also make sure that the process load is very high, say over 50% or more. This would be the conservative approach.

Tue, 03/31/2015 - 15:27

thanks What if the project is a warehouse for rent. Can the process energy be lower? Let's say 25%.
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Tue, 03/31/2015 - 15:32

A warehouse would be lower. It should not be arbitrarily set to 25%. How low would depend on the degree of automation associated with the warehouse. I have seen them below 25% quite often.

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