An air control device suitable for use in a heating and/or air-conditioning system comprises an air control member having a portion capable of selectively blocking the flow of air in an air passageway, a shaft member connected to the selective air blocking portion and having an axis about which the selective air blocking portion rotates, and a portion located at at least one end of the shaft that comprises a mechanism for inter-engaging with an actuating device for rotation of the shaft member; wherein the shaft end has at least first and second different mechanical configurations, wherein each configuration is capable of selectively interacting with a different type of actuation device.