I. Advantages over Traditional Air Ducts
| parameter | PIR foam ducts | Galvanized iron duct | Phenolic air ducts |
| thermal conductivity | 0.018-0.022 W/(m ·K) | No insulation | 0.036 W/(m ·K) |
| Fire rating | Grade B1(core)+grade A1(top layer) | Additional fireproof cladding is required | Class B1 (but with high actual smoke density) |
| weight | 1.4-4.5 kg/m² | 15-20 kg/m² | 8-10 kg/m² |
| Installation efficiency | 3-6 times more than traditional air ducts | On-site insulation +fire protection treatment is required | The brittleness is large and the loss rate is high |
| Service life | More than 20 years | 5-8 years(easy to rust) | 3-5 years(easy powdering) |
II. Selection Suggestions
Choose according to the environment
Outdoor or high-humidity environments: Prioritize the use of 200-micron aluminum foil or color steel plate surface layers, combined with anti-mold coatings.
Clean room: Single-sided smooth aluminum foil (Ra≤0.8 μm) is used, with seamless welding at the seams.
Select according to the system pressure
Low-pressure system (≤1000 Pa) : 20mm thick standard plate.
Medium and high pressure system (1000-4500 Pa) : 25-30 mm thick reinforcing plate, with double-layer aluminum foil or galvanized steel plate surface layer.
Select in accordance with fire protection requirements
High-risk areas (such as underground garages) : A1 grade color steel plate surface layer + B1 grade core material, certified by EN 13501-1.
III. Environment and Service Life
A. Environmental protection performance
Fluorine-free (CFC/ HCFC-free), formaldehyde-free, and free benzene-free, the all-water foaming technology complies with the EU RoHS directive.
Recyclability: PIR foam and metal surface layer can be separated and recycled, reducing waste.
B. Service life
Under normal usage conditions, the service life is ≥20 years, and the surface coating can be extended to more than 25 years. For instance, the anti-corrosion coating on the surface of aluminum foil can resist the erosion of acid rain and industrial waste gas.
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