Thanks to its excellent products and quality services, UNT Duct is one of the leading pir insulation duct boards manufacturers and suppliers in China. Welcome to buy the high quality and customized products from our factory. We will offer you the best service and fast delivery.

PIR Insulation Duct boards

Built around high-performance PIR foam core, our PIR Insulation Duct boards are lightweight composite materials. Combining superior thermal insulation, robust mechanical strength and official fire-rated performance in a single structure, they are a versatile choice for all HVAC construction applications.

Thanks to its modular and all-in-one design, this duct solution reduces overall energy consumption, greatly boosts on-site installation efficiency, and keeps ventilation running stably for years to come.

Structure: Silver Aluminum/ PIR Foam/ Silver Aluminum
Size: 3950*1200*20mm
Foam Density: 50-55kg/m3
Aluminum Thickness: 0.06mm or 0.08mm
Aluminum Color: Silver
Packing: 10 sheets/ package
Loading Capacity: 710 sheets/ 40'HQ (packed with plastic bags)
660 sheets/ 40'HQ (packed with cardboard box)

Air tightness, noise reduction and indoor air quality of PIR Insulation Duct boards

1. Superior Air Tightness

Specialized PIR adhesive is applied to fully seal joint crevices, delivering an air leakage rate substantially below the national threshold of 0.06 L/(s·m²). By contrast, flanged joints of conventional metal sheet ducts often exceed this standard by 1 to 3 times, triggering substantial unnecessary energy loss for HVAC air conditioning systems.

2. Effective Noise Attenuation

The foam core substrate features inherent sound-absorbing properties, cutting airflow-induced vibration noise by 15–20 dB. For medium and small mechanical equipment rooms, standalone silencers can be eliminated entirely, freeing up overhead ceiling clearance.

3. High Hygiene & Cleanroom Compliance

The smooth internal lining generates zero fiber shedding and airborne dust particles, fully complying with GMP requirements for food and pharmaceutical cleanroom environments. In comparison, glass wool insulation gradually releases loose fibers under prolonged airflow erosion, contaminating controlled clean zones and rendering it unsuitable for medical-grade applications.

What are the advantages of PIR Insulation Duct boards compared to traditional ductwork?

PIR Insulation Duct boards comprehensively outperform conventional metal sheet and glass wool-lined duct systems when evaluated against every critical performance indicator including thermal efficiency, air tightness, noise control, hygiene and construction practicability. Boasting exceptional closed-cell thermal insulation characteristics inherent to premium PIR foam cores, these ducts deliver outstanding heat retention and cold preservation capacity, which drastically curtails conductive and convective heat transfer loss along ventilation pipelines and substantially slashes long-term air conditioning operational energy consumption for commercial, industrial and cleanroom HVAC projects.

All duct segments are precisely prefabricated under standardized factory production processes, rather than fabricated manually on-site. This controlled manufacturing mode delivers uniform, reliable airtight sealing at all joints and flanges, paired with robust structural integrity that resists deformation, vibration and aging to secure a much longer stable service life compared to traditional duct alternatives.

Thanks to the integrated one-piece pre-insulated structure, the complicated, cumbersome multi-step field workflows required for separate metal duct assembly, on-site insulation wrapping and secondary sealing are completely streamlined. The simplified modular installation method greatly shortens overall project construction timelines, reduces labor demand and material waste, and ultimately helps property developers, contractors and end clients significantly lower the total comprehensive construction and operation costs of ventilation systems over the full project lifecycle.