exhaust fan 1.GRP outline border,strong anti-corrosion,no rust 2.Large air output 3.High quality 4.Low failure rate Poultry exhaust fan Description:Material of fan frame: glass fiber reinforced plastics(GRP)1) Energy saving. Take 54’’ type of fan for example, the power of general type of fan is 1100w or 1500w,but our fan is 750w.so,if you take use of it,you just need pay half of the cost.2)large ...