Axial Fans upto 800mm dia are available.The fan shall be tested and certified in accordance with Kedarnath Standard Kedarnath 210 & 300. This Seal for Efficiency Sound and Air Performance shall be tagged on each fan before leaving the factory. The manufacturer shall obtain Production License for National Industrial Products.The fan housing shall be made of quality carbon steel and continuously welded and use lap joint flanges. For the fan housing with the impeller diameter of less than 500mm, the carbon steel thickness should be no less than 2mm.