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NC-2009 EAp2:Minimum Energy Performance

Existing or new building threshold

There is a project which includes the renovation of an existing 40 ft high warehouse. The existing structure has only one (ground) floor of 30,000 sf. After the renovation the building will be converted to an office building with two more floors which will be included in the same building shell. Hence, its GFA will be 30,000 + 60,000 = 90,000 sf. Would this project be considered as an existing building renovation or since the addition exceeds the current GFA it would be considered as a new building? The critical question is whether the fact that all addition will take place within the same building shell allows the project to use the threshold for existing buildings.

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Santiago Velez
ASHRAE BEMP HBDP - LEED GA, Building Performance Consultant
Zonda
LEEDuser Basic Member
14 thumbs up

Thu, 08/18/2016 - 21:01

IMO this qualifies as a new building. If it's being converted into an office, you are probably adding HVAC, lighting, hot water and fitting out 100% of the buildings GFA. Then you should use new building threshold. You can use existing shell as a baseline if that helps.
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Fri, 08/19/2016 - 16:27

I think it is an existing building. Whether you can use the existing envelop will depend on whether the warehouse was a conditioned space or not before the renovation. If not then I do not think you can use the existing envelop exception from Table G3.1-5 Baseline (f).

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