G.A.S. EC1 Speed Controller The GAS EC1 Speed Controller helps growers optimize the environment in their grow rooms by thermostatically controlling the EC fans. The EC fan controller adjusts minimum and maximum speed levels to maintain the grow room's temperature at optimum rates. You can also adjust the intake fan with a Y-splitter cable. Set the target fan speed and temperature rates. The device will adjust the environment accordingly. You'll ensure enough airflow in the grow room and the controller will run according to the set parameters. The in-built temperature LED shows when the temperatures are over the set level. The unit directly plugs into the EC fan range.