Energyplus - Availability Manager Hybrid Ventilation Control Status

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As per the energyplus I/O reference, the output variable 'Availability
Manager Hybrid Ventilation Control Status' reports three integer values:
0,1, and 2 denoting no hybrid ventilation control, whether natural
ventilation is allowed, or not. However, the output result from a
simulation shows the values range between 1 and 2 (1.1,1.858796296,
1.758333333, 1.716666667 etc.).

Does it mean that there is a partial natural ventilation happening or
denotes that there is a potential to naturally ventilate? I believe this
should not be the case, as the output results has to just show a binary
result in either 1 or 2. Could somebody please explain how this has to be

Thank you very much in advance.

best regards,


Bldg simulation's picture
Joined: 2016-04-13
Reputation: 200

Hi Sriraj,

The EnergyPlus output results are the average values over the timestep. For
example, if the timestep is 10mins, and 5mins results 0 and another 5mins
results 1, then the average output would be 0.5.

Another thing you might want to be aware: If you select an output timestep
coarser than the simulation timestep, e.g. simulation timestep is 10min and
output timestep is 1hour, then it is more likely you will get those
decimals. Hope this could help!


Kaiyu Sun
Scientific Engineering Associate
Lawrence Berkeley Lab

Bldg simulation's picture
Joined: 2016-04-13
Reputation: 200