With bathroom exhaust fans, most of the < 0.3-sone fans move 80 CFM or less, while most of the 1.0-sone and louder fans move ...

See "Shopping for a Quiet Fan," below, for more details. In this article, we'll show you how to remove an old bath fan and install a new quiet one. In most cases you can do an exhaust fan replacement ...

Coming to installation, you can DIY a bathroom exhaust fan replacement if you're knowledgeable and have the requisite tools. But you'll have to seek professional help for ventilation fans.