We have 2 AHUs supplying OA to individual FCUs via a separate duct as per ASHRAE 62 intake requirement. The mixing occurs at the individual FCUs and then supplied to the zone. In such a scenario, should we consider it a Multiple-zone system or single-zone system?
Thanks!
Roger Chang
Principal, Energy and Engineering LeaderDLR Group | Westlake Reed Leskosky
LEEDuser Expert
398 thumbs up
November 14, 2013 - 8:49 am
Poorva, if an individual FCU provides ducted supply to more than one zone (with significantly different thermal load characteristics), you'll still need to use the multi-zone calculation approach in ASHRAE 62 for each FCU. If the FCUs are zoned appropriately, you'll be able to use a single-zone approach, which simplifies the required calculations.