Thermostatic actuator for a radiator valve comprising a valve member moveable along a valve axis through a range of motion including an open position and a closed position, the thermostatic actuator comprising: a base configured for supporting the actuator on the radiator valve; a thermostat mechanism supported on the base for movement along the valve axis with respect to the base, the thermostat mechanism comprising: a pin movable along the valve axis with respect to the base and operatively connected to the valve member to drive the valve member through the range of motion thereof; and a thermally responsive element operatively connected to the pin to drive movement of the pin along the valve axis in an opening direction in response to a decrease in temperature and to drive movement of the pin along the valve axis in a closing direction in response to an increase in temperature; and a set point adjustment mechanism configured to selectively adjust a set point temperature of the actuator, the set point adjustment mechanism comprising an input member movable in a first direction and a second direction by a driver, the input member being operatively connected to the thermostat mechanism to drive unitary movement of the thermostat mechanism in the closing direction with respect to the base when the input member is driven in the first direction to thereby reduce the set point temperature of the actuator and to drive unitary movement of the thermostatic valve assembly in the opening direction with respect to the base when the input member is driven in the second direction to thereby increase the set point temperature of the actuator, characterized in that: the set point adjustment mechanism comprises the driver, the driver being supported by the base and configured to be operatively connected to a power supply to draw power from the power supply to selectively move the input member in the first direction and the second direction, wherein the driver is configured to impart a braking resistance upon the thermostat mechanism when the input member is stationary, the braking resistance inhibiting unitary movement of the thermostat mechanism with respect to the base in response to a change in temperature.. a base configured for supporting the actuator on the radiator valve; a thermostat mechanism supported on the base for movement along the valve axis with respect to the base, the thermostat mechanism comprising: a pin movable along the valve axis with respect to the base and operatively connected to the valve member to drive the valve member through the range of motion thereof; and a thermally responsive element operatively connected to the pin to drive movement of the pin along the valve axis in an opening direction in response to a decrease in temperature and to drive movement of the pin along the valve axis in a closing direction in response to an increase in temperature; and a pin movable along the valve axis with respect to the base and operatively connected to the valve member to drive the valve member through the range of motion thereof; and a thermally responsive element operatively connected to the pin to drive movement of the pin along the valve axis in an opening direction in response to a decrease in temperature and to drive movement of the pin along the valve axis in a closing direction in response to an increase in temperature; and a set point adjustment mechanism configured to selectively adjust a set point temperature of the actuator, the set point adjustment mechanism comprising an input member movable in a first direction and a second direction by a driver, the input member being operatively connected to the thermostat mechanism to drive unitary movement of the thermostat mechanism in the closing direction with respect to the base when the input member is driven in the first direction to thereby reduce the set point temperature of the actuator and to drive unitary movement of the thermostatic valve assembly in the opening direction with respect to the base when the input member is driven in the second direction to thereby increase the set point temperature of the actuator, characterized in that: the set point adjustment mechanism comprises the driver, the driver being supported by the base and configured to be operatively connected to a power supply to draw power from the power supply to selectively move the input member in the first direction and the second direction, wherein the driver is configured to impart a braking resistance upon the thermostat mechanism when the input member is stationary, the braking resistance inhibiting unitary movement of the thermostat mechanism with respect to the base in response to a change in temperature..