Among other features of the flexible fiberglass duct resistant to high heat, strong structure, no need for re-insulation, easy portability and light weight of the duct especially in suspended ceilings, high flexibility, Low space requirement, easy installation and no need for an expert to install and resistant to shrinkages can be mentioned. The aluminum foil used in the inner layer of this product has the characteristic that the air leakage to the outside of the duct is always zero along the length of the duct.

Havakaran Tehran Noavar Company with the Flexirun brand is the first and largest manufacturer company of flexible ducts in Iran, and the flexible fiberglass ducts produced by this company has 6 meters length and diameter size of 4″, 5″, 6″, 8″, 10″, 12″, 14″ and 16″ (inches). These duct are used for ducting all kinds of duct split devices and fan coils. The use of this type of ducts increases the efficiency of HVAC systems, air conditioning systems and exhaust fans, etc., and prevents heat loss in winter and cold loss in summer, which leads to lower energy costs and increased comfort throughout the year.