I built this smoker from plans in my head! I bought the racks from Job Lot and kind of built it around them! The first year or so I used A-Maze-N dust generator for smoke; worked great... wanted to step it up a notch so I bought there newest and greatest generator the pellet burner! This thing puts out copious amounts of smoke for my cabinet! It is around 20" wide X 40" tall X 14" deep. I built a separate smoke box to house the new pellet burner so I can keep my inside temp low! It worked very well. Inside temps are under 85 degrees.