A window frame has a sash and a panel that is disposed parallel to the sash, both of which are slidably disposed in the frame. A receiver is fixed at a first end of the frame. When the sash is in a first position, the sash is disposed within the receiver. When the sash is in a second position, the sash is disposed outside the receiver. A motor is fixed relative to the frame with a drive system connecting the motor to the sash and/or the panel. A control input is connected to the motor and is configured to receive a signal from a controller, a sensor, and/or a building management system.