18 IN. SMOKE STACK EXTENSION FOR OKLAHOMA JOE'S HIGHLAND OFFSET COOKER USING 3 IN SMOKE STACK

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I have actually used an elevated container to place smoke wood into in my sfb to control smoke using a full hot bed of coals, but I never had much success using the minion method (incidentally, I no longer use my SNP, as it is a major fuel hog...approx 20-30lbs in 12-15 hrs).

In terms of this smoker, think in the 12" range give or take. Maybe even 18"?? Each case is unique, and it depends on your situation.But first, let’s look at the science of thermodynamics to better understand how the chimney works. Science of Thermodynamics

Yea, I guess I would have gotten confused there myself...I was referring mainly to a vertical smoker with that, I guess.Using a fan on the exhaust vent would help to reduce disturbances in the fire box, however, the fan and motor would now be exposed to much higher heat...something in the range of 250-350* depending on chamber temps and the amount of draft. I don't think very many small electric motors will live very long in that environment. Then, there's the issue of the smoke getting into the non-enclosed motor, leaving the eventual build-up behind. This will likely seize the motor in time, as the rotor would be bound-up, unable to rotate. If it were a brushed motor instead of brushless, the brushes and armature would be very dirty in a rather short period of time, causing unreliable operation of the fan motor. I sealed the side door because I didn't want a crosswind effect with the fan on that might result in air pointlessly blowing across the bottom of the firebox. Again probably overthinking it but it was an itch I needed to scratch. I have zero welding abilities and I am by no means a handyman, so basically if I can do this so can you. I bought some 22 gauge sheet metal at Home Depot and a cheap pair of aviation or tin snips and measured and cut some strips. I then drilled through the firebox and sheet metal as pictured and used the metal strips to pin the tadpole gasket in place. Probably not as clean looking as welding but I'm happy with it. As other posters have mentioned I rotated the grate 90 degrees and now there is about 4 inches of clearance beneath to help with air flow as well. When I first got my Pit Boss, I had no clue how to use it. To be honest, I still don’t know that much about it. However, I wanted to share how I use it.