Homewerks 7136-02HW Bathroom Vent Fan with Automatic Humidity Sensor and Powerful Exhaust Ventilation Fan for Large Room 140 CFM Whisper Quiet 1.0 Sone Energy Star - Amazon.com
How to replace or repair a bathroom fan - YouTube
Bath & Exhaust Ventilation Fans
Amazon.com: Broan-NuTone LP80 ENERGY STAR Certified LoProfile 4" Bath Ventilation Fan, 1.0 Sones, 80 CFM White Exhaust Fan : Everything Else