INNER TANK :- The inner tank of DANA SUPERHOT DLX is is 2-piece circular welded & is made up of made of extra heavy gauge hot dipped GI sheet with thicker zinc coating for long lasting life. INSULATION:- The thick CFC-free Polyurethane foam insulation helps in excellent heat retention and economical electrical consumption. HEATING ELEMENT :- Superior Quality Italian element(screw-type) which is ergonomicaly designed for efficient heating and cutting down electricity costs.