Smoker build question

[Beavis69101]

Good afternoon,

I’m going to build an offset smoker from a 47kg gas canister.

For the fire box I have a 19kg bottle.

I know there is a formula for the size of the chimney, but is there a rule for the size of hole between the fire box AND cook chamber?

Thanks

 

[guero_gordo]

there are indeed recommendations for the size of the firebox opening to the cooking chamber, scroll to the bottom for those fields:


http://www.feldoncentral.com/bbqcalculator.html