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PIR Rectangular HVAC Ducting

PIR Rectangular HVAC Ducting are essential high-performance elements for modern HVAC systems. Built with an aluminum foil–PIR foam sandwich, they replace traditional galvanized steel ducts with on-site insulation. Suitable for hotels, offices, airports, hospitals, and other commercial and public buildings.

Technical Parameter	Standard Value / Specification
Structure	Sandwich panel: Aluminum Foil / PIR Foam / Aluminum Foil
Core Material	Polyisocyanurate (PIR) foam
Panel Dimensions	3950mm x 1200mm x 20mm (also available: 2900x1200x20mm)
Foam Density	Approx. 52 kg/m³
Thermal Conductivity	≤ 0.020 W/(m·K)
Fire Rating	Class 0 (BS476 Part 6&7) or Class A (ASTM E84)
Operating Temperature	-50°C to 120°C

Service Life, Environmental Protection and Hygiene of PIR Rectangular HVAC Ducting

Durability Performance Indicators

Benefiting from the stable cyclic macromolecular structure of PIR foam, its thermal conductivity variation is controlled within a maximum increase of 5% across 25 years, with a rated service life of 20–25 years. By contrast, galvanized steel ducts develop corrosion and air leakage after 5–8 years, and rock wool will pulverise and lose its insulating function within 5 years. The overall life-cycle replacement cost can be lowered by 70%.

Environmental Test Outcomes

No harmful substances such as formaldehyde or benzene are released, and asbestos is absent from the formulation. The material loss rate during foaming production stands at only 3%, and residual scraps are recyclable for secondary manufacturing. The product meets requirements to gain bonus credits for LEED certification and China Three-Star Green Building Evaluation.

Cleanliness Characteristics

The smooth antibacterial aluminium foil cladding on both sides reduces internal air flow resistance by 12% and inhibits dust accumulation and mould growth. It is applicable to purified ventilation systems for food factories and surgical operating rooms. Extra antibacterial inner lining coating is unnecessary, resulting in zero additional consumable costs for clean system construction.