did you find a replacement for your Broan KW400 master ? I can help you with that... I have nutone 4406 / 3303 or M&S intercom systems... give me your price range and i'll let you know. henrysupport@cox.net Re[3]: NUTONE INTERCOM SYSTEM steve mcglothlin - 12th May 2007 6:00 I am also seeking a replacement for the Broan KW400 master