Where to assign Fan:OnOff, could not find it in Open Studio

asked 2023-08-17 07:10:59 -0500

lrebello's avatar

updated 2023-08-17 08:54:46 -0500

Hello again guys,

I am trying to assign the following object to either a Thermal Zone or a Air Loop, but I could not find this object in Open Studio.

Fan:OnOff Fan:OnOff

Does anyone know where this object is? Shouldn't It be in the library inside either Thermal Zones Tab or on HVAC Systems tab?

The reason I am trying to use this type of fan is because by using a Fan:ConstantVolume on an AirLoop the fan operation is not on and off. Looks like it is operating at fractions of maximum flow rate, and I want it to be either at its maximum flow rate or at zero flow rate. (See Picture 1)

Picture 1


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FanOnOff is not a zonal equipment. It can only be part of another system. What are you trying to model? A ceiling fan? An exhaust fan?

Julien Marrec's avatar Julien Marrec  ( 2023-08-17 07:46:53 -0500 )edit

I was thinking that I could use this as a outdooar air fan (taking outdoor air from outside the building and suppling it to a thermal zone).

I have tried to use a Fan:ConstantVolume in an Air Loop but it does not operate as I expected. I want it to cycle on and off (either 100% flow rate or 0% flow rate) , but looks like sometimes it is suplying at fractions of the maximum air flow rate. See Picture 1 (post edited)

lrebello's avatar lrebello  ( 2023-08-17 07:57:33 -0500 )edit