Providing make-up air for exhaust devices is easy, controlling it is not - until now. Broan Automatic Make-Up Air Dampers are the first to provide synchronized operation for kitchen, bath and whole house ventilation products. Installation is simple and requires no special wiring. The intelligent design options ensure optimum performance in a variety of installations and applications. Highly effective and affordable, the Broan Automatic Make-Up Air Dampers strike the perfect balance to keep you and your home breathing easy.