We have a LEED v4 ID+C for Retail project that has two water-source heat pumps (WSHP). One of these WSHPs has an OA CFM below 1000, so it is not required to have a monitoring device. However, the other has an OA CFM above 1000 and thus must have one. Our mechanical engineer requested that the monitoring device be installed so that it collectively measures the OA for both units. Would this be acceptable? If so, how should this be explained to reviewers?
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Dave Hubka
Practice Leader - SustainabilityEUA
LEEDuser Expert
530 thumbs up
June 13, 2024 - 2:29 pm
it is my guess that GBCI will require outdoor airflow monitoring at each "air handling unit" that provides more than 1,000 cfm; and not allow one monitoring device that covers both water-source heat pumps.
if the WSHP with 1,000cfm+ outdoor air is constant volume, maybe go the fan status switch route???