My new industrial neighbor built a wood burner from a tank that is 8 feet in diameter by eight feet high. It has a 6" flue pipe coming out the back ofthe top that then elbows through a block wall. He has about six 3" holes around the base. It has a 3' by 4-1/2' wide door to throw whole pallets in. Needles to say the whole building was full of smoke when I visited the other day. (My people were complaining about the smell and his building is 300' away.) My immediate thought was that the flue was WAY too small and not dampered and that there wasn't enough air intake holes and they had no controls. He asked me if there was some way of figuring the correct sizes for flue and intake...I don't have a clue but if he gets this monster working right, he said he will burn-up all my 5 acre/feet of scrap wood edgings and old pallets. And, it would get one of his buildings toasty warm. Where can I find out for him the correct way to do this?