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Multiple Fans on AirLoops

What's the story with placing multiple fans on airloops in OpenStudio/EnergyPlus? It wasn't legal in OpenStudio for a while but now it is.

How does EnergyPlus handle this? For example, if you placed a fan in the typical location and also placed one on the exhaust air outlet node. How would the fan on the exhaust air outlet node behave if the airloop was in warm-up mode with the OA % set to zero?

Also, does the availability manager for the airloops control both fans or just one?

Multiple Fans on AirLoops

What's the story with placing multiple fans on airloops in OpenStudio/EnergyPlus? It wasn't legal in OpenStudio for a while but now it is.

How does EnergyPlus handle this? For example, if you placed a fan in the typical location and also placed one on the exhaust air outlet node. How would the fan on the exhaust air outlet node behave if the airloop was in warm-up mode with the OA % set to zero?

Also, does the availability manager for the airloops control both fans or just one?