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FAQs about EAc4 :

For a split system, does the cooling capacity refer to the cooling power of the interior device (evaporator) or of the outdoor unit (condenser)?

What is the required timeline for completing a CFC phase-out for EAc4?

How can I document a longer equipment life (20 or 30 years) than what is listed in the LEED Reference Guide?

Do the requirements apply to portable fire extinguishers or only permanently installed building-wide fire suppression systems?

We plan on pursuing this credit only if we need to do so to meet our certification target, i.e. if another credit we are counting on gets rejected. How late can we apply for this credit?

I'm working on a renovation project and we'll be keeping some of the existing equipment. Shoud we include these systems in our calculations?

Which portions of a VRF/VRV system should be considered for this credit?


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NC-2009 EAc4:Enhanced Refrigerant Management

dedicated load from a central plant

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Bethany Beers
Commissioning and Energy Consultant
Mazzetti
LEEDuser Basic Member
5 thumbs up

Hello, We were previously unable to achieve this credit for a project receiving chilled water from a campus central plant employing 4 electric centrifugal chillers and 3 heat recovery chillers. The tonnage for these chillers was originally input as their total capacity, but we would like to reduce that tonnage to just that which is dedicated to our building (the plant serves like 20 buildings). Is it acceptable to take just our building's peak cooling load and distribute this evenly among the chillers for the "Q (tons)" variable? If so, what supporting documentation besides a load calc might be needed? Thanks.

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Profile picture for user JJKelly
Joyce Kelly
Architect - Cx Provider - Building Performance Specialist
GLHN Architects & Engineers
LEEDuser Premium Member
25 thumbs up

Tue, 02/28/2017 - 19:43

Geoffrey: Were you successful in proceeding as you described? Any additional supporting documentation besides load calc?
Profile picture for user tristanroberts
Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Tue, 06/06/2017 - 02:04

I've checked around, and unable so far to find a project that has taken this approach and has insight to offer. I'll keep checking.
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Dave Hubka
Practice Leader - Sustainability
EUA
LEEDuser Expert
510 thumbs up

Tue, 06/06/2017 - 13:15

We've had a number of projects that use a central chiller for cooling. In this case we determine the percentage of cooling capacity dedicated to the LEED project and prorate the central chiller tonnage, refrigerant capacity, etc..

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