I am having trouble understanding the allowable amount of refrigerant charge if I have multiple chillers and would like to pursue EA Credit 4. According to the reference guide, "Most projects have multiple units of base building NVAC&R equipment, but if each unit is compliant, the project as a whole meets the requirement." What happens if I have two units, only one of which is compliant on its own, but if the two units are averaged together, then they're compliant? Or, more simply, I am I allowed to use the average, or does one chiller with too much refrigerant charge make me ineligible for this credit?
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Scott DeGaro
Sustainability AdministratorBarge Waggoner Sumner & Cannon, Inc.
80 thumbs up
December 9, 2010 - 1:40 pm
The calculations are the weighted average refrigerant impact of all pieces of equipment. So if one unit is compliant and one isn't, but their weighted average is compliant than your project is compliant.