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how meny intake/exhaust holes do i need on my uds?

post #1 of 6
Thread Starter 

how meny intake/exhaust holes and what size do i need on my uds?

post #2 of 6

That is a loaded question that depends on some variables. The hotter you smoke the more intake you will need. Most of the builds I have seen have 2 or 3 1" intakes and about 2" total of exhaust. The intake is what really matters as that is where you control your temps.

 

I have 2 1" intakes with caps and 1 1" ball valve. My exhaust is the stock damper on the weber lid. I can run all the way to 400 degrees or down to 200 with no problems. 

post #3 of 6
Thread Starter 
Lump Charcoal
post #4 of 6

UDS = Ugly Drum Smoker

post #5 of 6
My UDS has 3 3/4" intakes. When cooking I only usually use the intake with the ball valve.
My exhaust is 2" bunghole and a 3/4" one on the flat lid.
It seems to work fine...
Though I could see an advantage going to 1" intakes if your smoker is loaded up with a lot of meat.
post #6 of 6

A UDS is not ment to be complicated its a very easy and simple build. the only thing i would worry with is to make sure you have close to the same area of exhaust as air intake it dont have to be exact, most people say the exhaust on a 22.5 weber lid is plenty. just be cautious when drilling a bunch of holes you can add more holes much easier than you can cover them up.

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