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Committee tables opinion on whether ERVs/HRVs must be inside conditioned space
Summary
The Mechanical Ventilation, Plumbing & Energy Codes Committee tabled an interpretation request from the City of West Richland about whether energy- and heat-recovery ventilators must be installed within conditioned space under sections R403.3.2 and R406 of the Washington State Energy Code.
The Mechanical Ventilation, Plumbing & Energy Codes Committee of the Building Code Council on May 12 tabled an opinion request from the City of West Richland asking whether energy recovery ventilators (ERVs) and heat recovery ventilators (HRVs) must be installed within conditioned space to qualify for the R406 credit.
Committee members and industry commenters debated whether the credit—written to reward heating and cooling distribution entirely inside the thermal envelope—was intended to include standalone ventilation equipment. "HRV, ERV is gonna make up such a very small percentage of the overall heating and cooling equipment," said Damon Doyle, of Doyle Construction, who warned that…
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