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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Baseline system for hybrid service hot water system

Vernon Smith

Principal Engineer

Smith Energy Engineers, LLC

LEEDuser Basic Member

0 thumbs up

Project location :

April 6, 2017

Our Proposed project (LEED 2009 NC) has a hybrid service hot water system that uses a water-source heat pump as the primary hot water generator and has a heat exchanger as a backup downstream of the heat pump. The heat exchanger source is hot water from a district heat gas-fired boiler. How do we model the baseline system? Is it either electric or gas, or should we model the same components as in the Proposed but use the performance requirements from Appendix G, Table 7.8? Thank you for any guidance!

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Fri, 04/07/2017 - 13:26

I would think you should model the same components in the baseline as in the proposed and match the fuel type individually.

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