Industrial induction heaters use current flowing through resistive elements to produce electromagnetic waves in the infrared (IR) spectrum. Over-the-side heaters hang over the side of a tank of heated material. Radiant flat panel heaters are used to heat objects via radiant heat transfer. Radiant heaters use a reflective shield to direct radiant heat onto a heated surface. Radiant heater elements are used with radiant flat panel and radiant reflective heaters. Radiators have coils that contain heated, circulated media such as oil, hot water, or steam. Room and space heaters are used to heat rooms, garages, and other areas. Steam injection heaters inject steam into a system to maintain or raise temperature levels. Strip heaters are flat heaters that can be bolted, clamped or stuck to a solid surface. Tubular heaters are used in custom heating applications. Water heaters are gas, oil or electric-fired devices that heat water for industrial or commercial use. Other unlisted, specialized, and proprietary types of industrial heaters are also available.