Pre-insulated ducts offer numerous technical and quality advantages over traditional galvanized ducts. These include manufacturing and installation time, health and safety risks, final weight, thermal conductivity, airtightness and condensation resistance, lifespan, cleaning and maintenance, transportation, aesthetics, and adaptability to various climates. These factors are briefly discussed in this article and the following one.
Manufacturing and Installation Time : Pre-insulated ducts are much faster to manufacture and install compared to galvanized ducts. This speed results in significant time savings and reduced manpower requirements for projects. The installation speed of pre-insulated ducts is three times faster than galvanized ducts.
Health and Safety Risks : Galvanized Ducts: Cutting galvanized ducts releases microscopic particles that pose respiratory hazards. In warm and humid environments, the adhesives used for insulation in these ducts promote the growth of bacteria, mold, and mildew. Additionally, the zinc coating on galvanized ducts can harm the environment.
Pre-Insulated Ducts: Cutting pre-insulated ducts (made from PIR foam) does not release harmful particles. These ducts are equipped with special anti-fungal and anti-bacterial coatings and comply with environmental standards. They are free of chlorofluorocarbon (CFC) and hydrochlorofluorocarbon (HCFC) and contain no microfiber, making them eco-friendly.
Final Weight : The weight of pre-insulated ducts is only 8–10% of the finished weight of galvanized ducts. This significantly reduces the dead load on buildings, which is a critical safety factor.
Thermal Conductivity : Pre-insulated ducts have a much lower thermal conductivity compared to galvanized ducts. With a thermal conductivity of 0.002 W/m²K, they offer superior energy efficiency, resulting in greater energy savings.
Airtightness and Condensation Resistance : Galvanized Ducts: Condensation in galvanized ducts leads to corrosion and degradation. Additionally, water absorption by the insulation diminishes its effectiveness, and moist areas become breeding grounds for mold and mildew.
Pre-Insulated Ducts: The tightly compressed PIR foam structure, combined with its water resistance and aluminum cladding, prevents condensation and water absorption. This ensures that pre-insulated ducts remain free from corrosion, degradation, and microbial growth.