The Broan Ultra Quiet Humidity Sensing Bath Ventilation Fan with LED Light (Model CST80SLW) is an 80 CFM ceiling-mounted bathroom exhaust fan designed for rooms up to 75 square feet. It features Sensaire humidity sensing technology that detects moisture up to 4 times faster than competing models and automatically activates the fan to prevent mold and mildew buildup without manual operation.

The fan operates at an ultra-quiet 0.8 sones and includes an integrated 3500K LED light module with a frosted polycarbonate lens for bright, energy-efficient illumination. The TrueSeal Damper technology reduces air leakage up to 50%, minimizing warm and cold air backdrafts. Installation is simplified with foldable mounting ears and the EzDuct connector, which allows room-side retrofit installation without attic access. Requires a minimum 2" x 6" construction space and uses a 4-inch duct connection. The unit operates on 120V at 0.6 amps and is ENERGY STAR certified and UL listed. Includes a 3-year warranty.