Criteria for identifying the quality of pre-insulated ducts : Without a doubt, identifying the quality of these types of sheets by touching them with your hands is a wrong method. Recently, some companies have started producing and distributing this product, which were only looking for their short-term benefits and profits, and quality was the last concern of these producers.
Therefore, by using these products in the projects, not only its benefits have not been used, but in some cases it has led to many problems in the work process.
Problems such as fire, production of toxic smoke, lack of flexibility and formability, and lack of resistance to moisture, which are all key issues in an air duct system. Therefore, in diagnosing the quality of this product, taking into account all the things mentioned in this article, a more accurate criterion should be used.
The best solution in this regard is valid certificates from competent international institutions that can prove the quality of a product. Institutions such as Under Laboratories USA, Warringtone Fire UK, which conduct tests at the highest level based on valid standards in this field such as NFPA, ASHRAE, ASTM, BS.