Hi just built new wood smoker it is 4ft tall,26 inches deep and 2ft wide with four racks.I will be ussin g hot plate and a amazin smoker.It is built out of tounge and groove 1x8 pine.I have door on front and small door on bottom to maintain smoker and hot plate.Question is where do i vent top and bottom and how big of vents?I have been reading and some say for exhaust vent in top or bring it down closer to top rack so heat rises and comes back down to excape..I will lose a little through the roof and door maybe.Also do i offset vents say intake on one side and exhause in top at oposite corner?? So where to vent? What size vents? Offset top and bottom? Do i exhause vent on top or somewhere else? help is appreciated also what do you use if wanting to insulate?