Humidifier not Working [closed]

asked 2021-09-26 05:19:00 -0500

Alejandro Lopez's avatar

updated 2021-09-30 01:31:37 -0500

I am trying to humidify the air in my building, as around 20% of the time humidity is below 30%.

I think I have followed the indications of this post fully (, but my simulation fails at the start. When I check the ERR file, the following error message pops up:

* Severe * Humidifiers: Missing humidity setpoint for Humidifier:Steam:Electric = ELECTRIC HUMIDIFIER

* ~~~ * use a Setpoint Manager with Control Variable = "MinimumHumidityRatio" to establish a setpoint at the humidifier outlet node.

* ~~~ * expecting it on Node="NODE 136".

* Fatal * Previous severe set point errors cause program termination

I find this odd, as I have done the following things suggested by the post:

  • Include a minimum and maximum humidity schedule (Schedule Type: Percent) into my thermal zone in the HVAC Systems tab

  • Add a SetpointManager:SingleZone:Humidity:Minimum and associate it to the thermal zone

  • Add a Humdifier:Steam:Electric into the HVAC loop in the location suggested in the post

I have alternatively tried to use a SetpointManager:MultiZone:Humidity:Minimum as I can set a minimum humidity ratio, but I get the exact same error.

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Closed for the following reason the question is answered, right answer was accepted by Alejandro Lopez
close date 2021-10-01 04:25:58.366650


Is the SetpointManager:MultiZone:Humidity:Minimum at NODE 136 as the .err suggets? This node should be the one after the humidifier

Petros Dalavouras's avatar Petros Dalavouras  ( 2021-09-26 12:15:06 -0500 )edit

@Alejandro Lopez what simulation tool are you using? From your error messages, it looks like EnergyPlus, but you could be using an interface like DesignBuilder or OpenStudio. Please add a tag for the simulation tool to your post so that others know how to provide better help.

Aaron Boranian's avatar Aaron Boranian  ( 2021-09-27 18:02:05 -0500 )edit

@petros-dalavouras thank you for your answer. It solved the problem!

Alejandro Lopez's avatar Alejandro Lopez  ( 2021-10-01 04:25:27 -0500 )edit