Honeywell SV9641M-4510 Intermittent Pilot with Comb Air Control, SmartValve and Standard Opening, 3/4" x 3/4" It can directly interface with the appropriate power supplies and a system thermostat for additional appliance applications When controlled directly by a thermostat, these controls do not provide a postpurge function, because power to the control is removed when the thermostat call for heat ends The systems are suitable for a wide range of fan-assisted combustion gas-fired appliances including furnaces, rooftop furnaces, boilers, unit heaters, infrared heaters, water heaters and commercial cooking appliances