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Honeywell #S688A1007, Sail Switch with 5 in. wide sail BaseSKU-54753 (1) 32-495 1/32" Burner DrawerHoneywell #S688A1007, Sail Switch with 5 in. wide sail The Sail Switch activates an electronic air cleaner, a humidifier, or other equipment in response to airflow from the system fan. The S688A is mounted in the return air duct where the sail will be in the direct path of an unrestricted air stream. Features Simplified installations with multi speed fans, in accessible air handlers, fan motors with voltage or phase different from controlled