We have a project where a Walk-in refrigerator and freezer are planned. These rooms will be equiped with dedicated split-system charged with R404. It seems that the Rc will be above the 5lb/tons, mostly because of the distance between the freezer rooms and the mechanical rooms. In the LEED-Canada template, there a limit of 5lb/ton. Is this an ARI requirement or could we just propose an alternate calculation to demonstrate compliance. All the other systems are compliant with the requirements.

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Ante Vulin

Sustainability Manager

YR&G

LEEDuser Basic Member

55 thumbs up

Mon, 02/10/2014 - 15:01

Earning this credit is based on the average refrigerant impact per ton, for all HVACR equipment in the project scope. It is possible that you can still comply if one type of equipment exceeds the maximum charge. But if you have entered all your equipment into the credit form and still do not comply, you may be out of luck.

David Rekker

Project Principal

MMM Group Ltd.

LEEDuser Basic Member

4 thumbs up

Thu, 03/06/2014 - 22:29

We are using the EAc4 calculator published by Trane for a similar scenario. As it uses the same default values and formulae, we're confident it will be accepted in lieu of the LEED Canada template that doesn't accept an input greater than 5lb/ton.

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