Frequently Asked Questions - Bath and Ventilation Fans

  • How do I properly size an exhaust fan for my bathroom?

  • What does CFM mean?

  • What is a Sone, and how is it measured?

  • What is continuous ventilation?

  • Can I mount BROAN fans above my tub and shower?

  • Can my ceiling fan be surrounded by insulation?

  • Will BROAN Fans work in wall-mount applications?

  • Will a ceiling fan or wall-mount utility fan serve as a range hood?

  • What does "static pressure" mean?

  • How long should a bath fan run after a shower is used?

  • What should I do if I can't wait for moisture to clear, but I don't want a fan to run all day long.

  • What are the timer features?

  • Where should the exhaust fan be located?

  • Where is the exhaust outlet on the ventilation fan?

  • Why do the windows and mirrors fog even when the fan is running?

  • Why is water dripping from the grille of the fan?

  • Can I install a heater over the bathtub or in a shower?

  • Can I use an inline or multi-port fan in one large bathroom?

  • Does a duct-free bath fan expel air?

  • Can I use a smaller diameter duct than what the fan is designed for?

  • Can larger diameter ducting be used with my bath fan?

  • What type of duct is recommended, rigid or flexible?

  • Can I exhaust my fan into my attic instead of out the roof or wall?

  • What type of exhaust fan is best for a sauna or hot tub area?

  • Can I use a fan in a steam shower?

  • Can I vent more than one bath fan out of a roof or wall cap?