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The Hot Air Blower Switch Heater provides track switch snow removal during severe winter conditions. This type heater has been engineered and constructed for dependable service, maximum heating efficiency and safety with minimum maintenance. The oil, propane gas or electric powered units use a high-pressure blower to force an air stream into the main duct, which passes under the tracks and is isolated to safeguard against possible track circuit interference. Various nozzle arrangements, duct insulation and heat retainers are available to provide maximum heating efficiency.