Ok the esse we installed was not the iron heart it was their cat cook stove it was 840 lbs and it is a cooking beast not a great heater because it it meant to be cooked wit hall year long but it is a fantastic cook stove. And in Europe it has clearance to combustibles of 3/4" it is not ul listed here yet. I agree that as far a value goes the kitchen queen is probably much better but it does not compare to that esse as a cook stove and yes you can get a water tank for it as well