Steel Shell Furnaces offers the structural strength of a steel shell-based design with the economies commonly associated with box frame furnace. This furnace features include heavy-wall, water-cooled, extended copper coil for maximum power efficiency. The material of construction of shell can be steel. This design combines the electromagnetic field within the furnace structure and redirects most of that field back into the melt for maximum induction efficiency. This shell should totally protect induction coil from metal splash. This shell furnace should have provision for fittings, ducts to remove smoke and fumes during melting.