Exceptional ventilation is vital to protect your home and family from mold and mildew caused by moisture, unpleasant odours, and even poisonous gases like carbon monoxide. Modern homes are now built to be more energy efficient and are thus more tightly sealed, keeping in heated and cooled air, but also harmful airborne pollutants. Your incredibly quiet HushTone bath fan will stay on continuously at a very low CFM when left off and will ramp up to its maximum CFM whenever it is switched on. Eradicate these problems with the incredibly quiet and powerful Cyclone HushTone bath fan. Imagine breathing easy, knowing your family is in a well ventilated home, free of mold, mildew and indoor pollutants. Keeping the air in your home fresh and circulating at all times.