Panasonic WhisperWall Through-Wall Exhaust Fan, 70 CFM

This fan features a totally enclosed condenser motor and a large, double suction blower wheel to quietly move air. A small wheel turning very fast will create more noise than a large wheel turning more slowly for a given airflow. Our fan uses a wide blower wheel that moves a large amount of air at reduced RPMs. The blower wheel is also designed to draw air in from both sides, which helps keep the noise down, as there is more area for the air to enter the wheel. In fact, it is quiet enough that you might not even know it's on

Advantage Features
•Super quiet operation
•ENERGY STAR® qualified
•Four-pole, totally enclosed condenser motor for long life
- rated for continuous run
•Easy installation
•Rust proof paint treatment on galvanized housing
•Through the wall ventilation fan, complete with an outside vent hood and back draft damper
•Low profile, contemporary grille design
•CSA or cUL certified
•Home Ventilation Institute tested and certified