Havakaran Tehran Noavar Company is the largest producer of standard flexible ducts in Iran that markets its products under the Flexirun brand. All Flexirun products have ISO 9001, 14001 and 18001 from Switzerland. Since the ducting in the pharmaceutical industry has always faced many problems, Havakaran Tehran Noavar Company has launched the production of PVC flexible air ducts, which has been the focus of many pharmaceutical factories. High flexibility, resistance to relatively high air pressure and acceptable strength of PVC flexible ducts are among the advantages of this product of Havakaran Tehran Noavar Company. PVC flexible duct application is in the pharmaceutical, wood, ceramic, clean room, agricultural and etc.  industries and it is widely used for ducting and ducting in order to transport air and particles or dust.