This is a terrific smoke generator at a great price.   Couple of tips.  Once your chips or pellets start smoking, turn off the heating element.  By separating with galvanized, 3" round duct between the smoker and this unit, you can get truly cold smoke.  A 4" fan near the clean-out drawer will keep your pellets or chips going well and create a slight positive pressure.  Apply steady pressure or a temporary seal to the hopper, so that all your smoke goes to your smoker and not up and out the hopper.