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If pursuing Option 2, what is the scope of the energy model if the space shares a central plant, and what type of software should be used?

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CI-2009 EAc1.3:Optimize Energy Performance—HVAC

Core Performance Compliance New Air-handler- Existing Chiller

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Tom Nichols
LEED AP (O+M)
4 Elements Group
LEEDuser Basic Member
34 thumbs up

If we specify a new air handler that uses steam and chilled water from existing systems, do these systems need to comply with the CPG efficiency requirements? We are looking to use Option 1. The air handler is a 5 HP VAV unit so it would just need a variable frequency drive, correct? Thank you,

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

Wed, 11/27/2013 - 20:47

I don't think the existing systems would need to comply with the equipment efficiency requirements (2.9). The 5 HP VAV has to meet the criteria in 3.10. It is not just having a VFD. It requires that the control will result in fan motor demand of no more than 30% of design wattage at 50% of design flow.

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