[QUOTE=jcm2m9;2192197]I built a PID temp controller. What you are seeing in the back is the fan and the union that I used to make the fan removable from the pit. When the controller is running it will keep the UDS within a few degrees of the set point.
! nice set up. I have been working on a design using a Honeywell controller and a RTD for supply temp and RTD for drum temp. What are you using as your control variable? I assume space/drum temp?