Question-and-Answer Resource for the Building Energy Modeling Community
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For ZoneHVAC equipment such as PTAC (packaged terminal air conditioner), fan coil, etc., outdoor air is mixed with return air in the unit. DX split systems are typically modeled as an airloop system.
For the large apartment complex application, yes, a single airloop to provide OA to multiple zones should be identical to multiple single-zone OA units.
