The 512M 6-Inch Through Wall Exhaust Fan delivers 80 CFM high airflow with quiet 4.0 Sones operation, making it an ideal bathroom ventilation fan, bath exhaust fan, or exhaust fan wall mounted. It features an adjustable aluminum duct for 6–20" walls, a durable copper motor, and rust-resistant electrophoretic coating, perfect for bathrooms, kitchens, garages, or attics. The backdraft flap prevents outdoor air from flowing back, and the aluminum grease filter captures grease and airborne particles to keep your space fresh and clean, providing reliable ventilation for any wall-mounted installation.