Install the Broan Room to Room Wall Mount Utility Fan in an interior wall to spread heated or cooled air from one room to another. The fan features a solid state speed control that regulates the fan speed and the sound level selection. Finished with rugged black epoxy paint, the fan's housing is 25 gage and can be fastened to the walls in several different ways for added flexibility. The two contemporary-styled grilles can be painted to match any décor. An optional aluminum filter is sold separately.