It will help keep mildew at bay. You can also install a condensation- and humidity-sensing switch (Dewstop FS-100, about $50; dewstop.com
) that'll turn on the fan automatically when the air gets steamy from showers and then shut it off after 30 minutes, once the air is clear. It's compatible with any exhaust fan, but this gadget's auto sensor may work better in smaller bathrooms where the switch is close to the shower.The payoff:
You could postpone the need to hire a painter to kill mildew and repaint the bathroom, easily a $500-plus
job. Or, if you tend to leave your manual switch on overly long, you could save $90
in annual heating and cooling costs.