Thermal insulation
Insulation is the main method to prevent energy loss in air ducts. In traditional galvanized ducts, the use of glass wool or stone wool insulation creates many problems in terms of fire and health risks during construction and implementation. Also, the use of elastomeric insulation is also due to the large side surface of air ducts and high cost. Such insulators are not affordable. In the pre-insulated ducts, polyurethane or phenolic compressed foam is used, which is free of any CFC, HCFC and toxic substances and is environmentally friendly, which has a very low heat transfer coefficient, uniform insulation coverage on the entire surface of the duct, resistance It is one of the unique features of this material against humidity and water vapor and use in a very high temperature range.
Ventilation
Preventing air leakage along the path of the air ducts is an effective factor in preventing the waste of energy spent in preparing and transporting ventilated air. According to the construction of galvanized ducts and also the connection of the parts of these types of ducts, the air leakage is always more than the standard limit. Meanwhile, the uniform structure of pre-insulated ducts and the use of three types of special adhesives during construction and tight connections with special flanges provide a very high reliability factor for air sealing for pressures up to 2000 pascal.
Indoor air quality
The air transfer path should always be free of any contamination. Galvanized ducts are always a suitable environment for the growth of bacteria, fungi and contamination due to the type of galvanized materials and also the adhesives used in insulation. At the same time, the minimum aluminum cover and the quality of the special adhesives used in the pre-insulated ducts create optimal air inside the duct and it is a suitable product for use in clean rooms, hospitals and laboratories.
Resistance to water vapor and condensation
Water vapor in the air is always distilled on the outer surface of the air ducts in the summer due to the temperature difference on the sides of the duct and the dew point temperature of the air. The contact of water vapor with the insulation of galvanized ducts causes the loss of the insulation property and the creation of mold and fungus, as well as the failure of the false ceiling, due to the separation of the insulation and the duct itself, parts of the duct are always exposed to the ambient air, and from this The above phenomenon is inevitable. In pre-insulated ducts, due to the waterproof combination of insulation and the integrated structure of this type of duct (one layer of foam and two layers of aluminum coating), it completely eliminates the problem of water distillation.
Speed of execution
In galvanized ducts, implementation is carried out in two phases: construction and installation of the duct and the insulation phase, each of which takes a significant amount of time. Therefore, the implementation costs are high due to spending more time and labor. In the case of pre-insulated ducts, due to the fact that there is no insulation phase, the construction and installation of the duct is much faster.
Sound insulation, resistance to UV rays, longevity and durability can be mentioned among other advantages of this type of duct, which has played a great role in the success of this type of product in the air conditioning industry.