Industrial exhaust fan for warehouse refers to the material of the fan, its appearance, size is same to steel fan, but the shell and balde for the material of glass fiber reinforced plastic, its biggest characteristic is corrosion resistance, acid and alkali resistance, itâ??s a kind of anti-corrosion fan. Product Features: All sheet metal inside is made of stainless steel and aluminum to ensure the best corrosion protection. The maximum ambient temperature is 40 degrees. It is using durable bearing combine with zigzag belt to operate the fan. With thickened and widened FRP motor bracket: using SMC fiberglass material, with impact resistance, aging resistance, corrosion resistance, smooth surface, strong and durable, continuous service life can reach more than 20 years. The material is suitable for extreme weather. Large-size cone can be spliced for easy transportation. The SMC technology fiberglass reinforced plastic shell is very strong and has high corrosion resistance (all materials are smooth on both sides and have a UV protective layer). Antiseptic PVC shutters. Features and Benefits: 1.Commercial & Industrial grade Made of new material in market which isSMC aka Fiberglass 2.Long lasting Good alkali resistance, anti corrusion, anti aging and anti rust due to its material 3.Powerful air volume High volume design propeller fan for air blowing or hot air exhaust at 25000 m3h 4.Highly energy saving Low power consumption which is around 10-15% of air conditioning system 5.Relatively higher send wind distance Motor direct drive producing relatively higher air static pressure than belt driven mechanics. 6.Suitable for commercial & industrial use Best fit for property that emits chemical gas as this is anti corrusion and good alkali resistance 7.Guaranteed after sales support