Constructed with a lightweight yet high-strength polyurethane core, clad with aluminum foil or color-coated steel plates on both sides, these ducts deliver exceptional thermal insulation, fire resistance (Euroclass B-s1-d0 / ASTM E84 Class A), and corrosion resistance. Their integrated structure ensures easy installation, airtight seams, and low air leakage rate (≤1.2%), significantly reducing energy consumption and noise levels. Customizable cutting allows seamless adaptation to commercial buildings, cleanrooms, and specialized facilities. Compared to traditional metal ducts, they achieve over 30% energy savings, require zero long-term maintenance, and represent the optimal choice for high-efficiency, sustainable ventilation systems.