The Space Saver dual chamber furnaces have lightweight, low mass ceramic insulation instead of traditional brick, and save operating costs by requiring less electrical power. The units also use low-mass, coil-wound heating elements mounted on ceramic rods, resulting in rapid heating and cool down, more heat cycles in a workday and greater productivity. The upper hardening chamber is rated up to 2200F, the lower draw chamber up to 1600F. Each chamber is individually operated with separate digital controls, thermocouple and contactor. The lower draw chamber is also equipped with a fan assembly and stainless steel liner for recirculation and uniform temperature. Standard equipment includes pre-mounted spring-load, easy-to-operate vertical lift doors for increased safety.