Abstract: Air passed through each of a plurality of magnetizable cores is heated by application of alternating electrical current to an induction heating coil surrounding each magnetizable core, the coils being connected together in an electrical network. Each magnetizable core is comprised of a cylindrical, loose roll of magnetizable material, either a mesh screen, or sheet metal, for use in a forced air heating system.

Abstract: Fluid placed in contact with each of a plurality of magnetizable cores is heated by application of alternating electrical current to an induction heating coil surrounding each magnetizable core, the coils being connected together in an electrical network. A core comprised of a cylinder containing magnetizable steel balls, when partially filled with water as a fluid, produces steam at an outlet for use in a heating system or to provide motive power. Air, as a fluid, when passed through a core comprised of a roll of magnetizable material, either a mesh screen, or sheet metal, is heated for use in a forced air heating system.