I'm using a 24" X 3" single wall, snap lock duct pipe for my vent pipe.
Seen HERE.
I used an 8' aluminum dryer vent pipe, fully extended, from my MOD box to my inlet elbow, for cooling the smoke.
I got an
Inkbird Brand controller to use two ways: For Sous Vide on a small crock pot. And as a below 100 (MES lower limit) heater control. Box stock it does +/- 3 degrees. Set to 1 degree, it typically runs +/- a single degree of set point.
Plenty tight enough for my needs.
And added a bypass to my MES 30 so I can select Normal or Bypassed Control of my MES 30 element. That way I can control the temperature accurately below 100 degrees.
You could also do this using the Auber controller and modifications well documented here on SMF.
But the point is to try and keep the MES in range for 'cold' smoking. For my use, I want 70-80 degrees inside my MES for my fish smoking. Generally, my cold smoking is done overnight for cooler ambient temperatures.
By adding a box fan behind my rig-a-ma-jig MOD and MES 30, on low, I've been able to keep the heat inside the MES at 2-3 degrees above the ambient air temperature in tests.
I'm considering plugging my fan into the cooling cycle of the Inkbird, as well as the MES 30 heating into the heating plug to further automate the temperature control for my Cold Smoking.
So, much less "By guess and By golly" as in the past for me. With the
AMNPS doing a steady, even, 11 hours of smoke, Sweet dreams of cold smoked goodness fill my noggin.