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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Air Economizer Requirement

Rock Ridolfi

Associate

Engineering Economics, Inc.

LEEDuser Expert

7 thumbs up

February 20, 2015

The owner would like to eliminate economizers on a few of the air handlers. Project is located in Climate Zone 3. Are project teams required to include air economizers on the proposed air handling units? And if not, are we required to meet the cooling efficiency requirements of Table 6.3.2 of ASHRAE 90.1-2007? EAp2 only requires project teams to adhere to the mandatory provisions of section 9.4 of ASHRAE 90.1, however section 6.3 address the requirement to include economizers. It allows project teams to eliminate economizers if the cooling efficiency meets the minimum EERs as outlined in table 6.3.2. Any direction that can be provided is greatly appreciated. Thank you.

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Fri, 02/20/2015 - 14:26

You are not required to install any of the prescriptive measures in the Proposed. Air-side economizers are prescriptive whether you are using the simplified approach or not. So the answers are no and no.

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