An apparatus, such as a heater, is provided that includes a base member having at least one fluid passageway. A two-phase fluid is disposed within the fluid passageway, a pressure of the two-phase fluid being controlled such that the two-phase fluid provides at least one of heating and cooling to the base member. A tuning layer is secured to the base member, and the tuning layer includes a plurality of zones. Furthermore, a component, such as a chuck by way of example, is secured to the tuning layer.