QUIET OPERATION: The fan has a sound output of just 63/55 dB, which does not have any harm to your health and will not disturb your work. WIDE APPLICATIONS: It can improve airflow to reduce humidity, block odors, and lower temperatures in grow rooms, basements, kitchens, bathrooms, laundry, etc. EASY INSTALLATION: The rust-free exhaust fan can be easily installed in a loft or roof space. SAFETY PROTECTION: The fan features an overrun time adjustment of 2–30 minutes to prevent overheating or other safety issues. Geepas 4″ Duct Fan- GF21194/ 2200 RPM, Exhaust Ventilation Fans/ 13 w, Perfect for Residential and Commercial Use, for Bathrooms, Kitchens