For CAV, a current transducer on the supply fan, an airflow switch, or similar monitoring device must be installed.
If a BAS can monitor airflow fan modes (strong/weak etc.), is that sufficient to comply with this requirement?
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Steve Loppnow
Sustainability Account ManagerStok
LEEDuser Expert
294 thumbs up
January 20, 2017 - 4:19 pm
Yasuhito,
The system may be able to deliver enough OA in all conditions, but it needs to be documented by completing the associated calculations. The prerequisite doesn't prescribe system type, but minimum OA requirements based on floor area, occupancy, system type, etc. You'll need to complete the minimum indoor air quality performance calculator, regardless of system configuration or BAS capability. http://www.usgbc.org/resources/minimum-indoor-air-quality-performance-ca...
Christopher Schaffner
CEO & FounderThe Green Engineer
LEEDuser Expert
962 thumbs up
February 13, 2017 - 10:51 am
For a constant volume system an airflow measuring device is not required. You just need to monitor system status. If the BAS can tell if the fan is operating properly, and the balancing shows the appropriate airflow, I think that would be enough to meet the requirements.