We have a 100% outside air HVAC with an energy recovery wheel serving the entire the project space. Since there is no recirculating air getting reintroduced to the supply side, the MEP engineer has the airflow measuring station installed at the supply outlet of the unit instead of the outside air inlet of the unit because according to him, the monitoring device "is measuring the OA regardless of the location".
Does anyone know if the LEED reviewer will allow the outside air measuring station to be installed at the supply outlet of the unit when I submit th the controls drawing?
Gustavo De las Heras Izquierdo
LEED Expert184 thumbs up
January 4, 2024 - 8:59 pm
Hi Edgar,
Technically speaking, your airflow measuring device does not meet the prerequisite requirements, and this issue will (probably) be raised by the reviewer.
Dave Hubka
Practice Leader - SustainabilityEUA
LEEDuser Expert
525 thumbs up
January 5, 2024 - 9:11 am
reference guide states "if a 100% outdoor air system provides ventilation air to the return of downstream terminal devices, the 'outdoor air' measurement device needs to measure the outdoor airflow rate at the 100% outdoor air unit only".
my interpretation of this leads me to believe that as long as the outdoor air monitoring device is located before any return air duct then it would be approved by GBCI.
I agree with you MEP engineer.
Edgar Arevalo
Associate18 thumbs up
January 5, 2024 - 10:05 am
Excellent! Thank you, Dave.