Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Debayan93,
I don't believe DesignBuilder can do humidity control with only an FCU in the zone. Usually it requires an Air Loop with setpoint managers to control humidity. So, to simulate a full recirculating system like this, just be sure to set all your outside air values to zero (at both the Air Loop and AHU). I always find the humidity control takes a little trial and error to get it to work how you want, but the following link to DesignBuilder's online help walks you through the base process pretty well.
[https://designbuilder.co.uk/helpv6.0/#HumidityControl.htm?TocPath=Building%2520Models%257CDetailed%2520HVAC%257C_____11]
I'd recommend referring to the online help as you work through other issues in DesignBuilder. I've been a user for about 3 years and I still refer to it regularly.
Hope this helps.
