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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Selecting system type

Haojie Wang

Energy Modeler

KJWW Engineering

LEEDuser Basic Member

3 thumbs up

September 28, 2015

We have a project that consists of both residential and non residential units. Per 90.1 2007G3.1.1 exception a. we need to use two HVAC system types for residential and non-residential separately. My question is, for the non residential portion, how we determine how many floors or square footage to select system type? For example, if we have 8 floors, 2 of which are retail and 6 are apartment. For the non-residential system, should we select system 3 based on only the retail portion or select System 7 based on the whole building? Thanks in advance

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Wed, 09/30/2015 - 17:00

You select the non-residential system based on the area and number of floors after removing the residential portion of the building. So it sounds like a system 3.

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