1.Poultry exhaust fan with CE 2.Import belt 3.Air Volume ... Provide 7*24 hours on-line service.Technology parameters Fan specificationsBlade Diameter mmFan speed r / mInput power ... noise test, vibration test, concentric performance test, fan blade turning speed test, input air test and vehicle ... and trust of customers. Aonuodi Exhaust Fan JFD-1250E for Greenhouse/Industrial/Poultry with CE certificate