This started with a food hot box I purchased from a used restaurant supply store. I installed a draft in the door and vent with a dampener in the top. The old heating elements were removed and I installed a 1100 watt hot plate element in the bottom. My control box has the digital temp control and outlet for the cocktail shaker smoke generator. The toggle switch controls if I want the heat element on or off , ie cold smoking just reading temp. I installed a stainless steel baffle plate to even out the heat.