Air flow: 50CFM Noise: 1.1 sones Mounting size: 8" ... CUL, ... AUPU heavy-duty bath fans - AF50G1:.* Compact design for small rooms, such as bathroom, shower, bathtub, toilet, utility room ... : 100mm (or 4 inches )* White color.Keywords: fan, exhaust fan, bathroom fan, ventilating fan, ventilation fan, bath fan, ceiling exhaust fan, ducted exhaust fan, greenhouse exhaust fan. Ventilation Fan - AF50G1