Broan’s “Sensaire Sense-on-Rise Technology” is now available on the company’s Invent Series ventilation fans, providing a way to manage humidity without sacrificing design. According to Broan, sensors that are hidden in the light fixture detect moisture in the air, automatically turning the fan on when a rapid rise in humidity is sensed or when humidity rises above a programmed set point. Broan says the unit helps clear fogged mirrors, manage moisture, and improve indoor air quality. Prices range from $300 to $500.