Rear center firebox build help

[meyers]

I am building a 250 gallon propane tank smoker on a trailer and would like to have the firebox on the back center of tank. How big of pipe would I need for my firebox any help would be appreciated

 

[ahumadora]

About 30- 40% of the cooker volume will work well.

Post some pics and more details for accurate answers.

http://www.smokingmeatforums.com/a/reverse-flow-smoker-how-to-calculate-build-tutorial