This fan and some of the PID controllers (like the one Norco linked to) can use 12 volts. I am thinking of running it off a lawn tractor battery I have. The controllers use only about 3 watts, the fans 200 watts maybe... so total draw is less than .3 amps... a 19 amp battery can run the rig for 24 hours no problem.
wiring the fan direct to the battery is possible, or wiring it direct to the power supply is possible... is that what you are asking?
Or I can use one of the many orphan 12 volt power supplies I have collected over the years..... lots of good junk in that 'ole garage!
Why on a UDS at all? I did see some 20 degree temp dips towards the end of a 4 hour rib smoke, (on 1/2 chimney of K-blue) rolling robot around raised the temp... (shaking the coals I imagine)... I am getting ready for the 12 hours low and slow giant brisky smokes.... worry free! did I mention I like toys?
Building "Robot", my UDS:
UDS "Robot" (the easy smoke oven), CL CharGriller w/sfb, Stok Quattro