Tomorrow my partner and I finally start my competition RF trailer build. We have most of the planning done, but I am not sure the "smoker calculator" is working for this application. This is about a 300 gallon build, and I am going to use two five inch exhaust stacks. One of them is going to have it's flow divertable through a warming box that will be around another 120 gallons. 32 by 36 by 26 are the dimensions of the warming box. The calculator say's I need 2 stacks that are about 15 inches in length. How should I compensate for the fact that the smoke from one of the stacks may be diverted through the hot box? Thinking I should put some vents on top of the box as well. What are your thoughts?