Yes they are insulted. They are a combination of both a drum style cooker and a cabinet style. I cook on both so I designed and had built what I think would be the best of both worlds. What you don’t see in these pictures it comes with a side shelf as well. Then as well with the ball valve I have 3 inch and a half in takes going to be on the front of the smoker. This was designed to hanging 16 to 24 racks of ribs. Each unit weighs in at about 250 pounds.