Exhaust fan nf-214 is an important ventilation fan with high air volume, low noise and long service life. A: air conditioning: effectively eliminate smoke and pollution, inhalation of fresh air. Two: odor discharge, quickly eliminate the smell of retention in the kitchen and toilet. Three: drive away moisture, quickly eliminate the bathroom moisture, prevent the building decay. Four: control the hot air, remove dirty hot air, and supplement the cold air, comfortable indoor.