Forum discussion
NC-2009 EAp2: Minimum Energy Performance
ASHRAE 90.1-2007 Sec G3.1.3.10 requests that users specify pump power of 22 W/gpm, with a primary / secondary pumping system and variable flow on the secondary side. In my particular design, the proposed system is variable primary without scondary pumps.
I have seen two interpretations adopted by LEED reviewers:
1) both the primary and the secondary pump shall be allocated 22 W/gpm.
2) the primary and the seconary pump shall share the 22 W/gpm.
Any preference among this community?
Aaron
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5906 thumbs up
May 18, 2012 - 11:43 am
Good question Aaron! The Standard is not real clear on this one. Our interpretation is #2 which is the conservative approach. Would love to hear other thoughts on this one.