N&h series exhaust fan is an advantage product of our company, which has the characteristics of large air volume, long life and low price. N&h series exhaust fan is a high quality exhaust fan. 275g galvanized coated galvanized sheet is selected as raw material, which has stronger corrosion resistance. The fan blade has a large angle, which resulting in a particularly large air volume. The fan blades adopt single punch forming from imported stainless steel plates to ensure strength and durability.Because of the larger air volume, we recommend to use of Chinese high-end motor or Siemens motor , which is the basis for ensuring normal operation. We must use high quality motors to ensure its normal operation.