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Rigid PIR Pre-insulated Duct

Rigid PIR Pre-insulated Duct is a modern, all-in-one HVAC air distribution system that replaces traditional sheet metal ducts. It consists of a rigid Polyisocyanurate (PIR) foam core factory-bonded to aluminum foil facings on both sides. This "sandwich" construction combines the air handling duct and its thermal insulation into a single lightweight panel.

Core Composition

The performance of this system comes from its three integrated layers:

Core Material: Rigid Polyisocyanurate (PIR) foam. It is a thermoset plastic with a closed-cell structure that offers high thermal resistance and superior fire performance compared to other foam insulations.

Facings: Factory-laminated aluminum foil on both sides. This provides a smooth, airtight surface for airflow, a built-in vapor barrier, and a reflective surface that enhances thermal performance.

Key Feature: The core is often fiber-free, making it suitable for environments requiring clean, non-contaminated air, such as hospitals or clean rooms.

Key Benefits & Advantages of Rigid PIR Pre-insulated Duct

Rigid PIR ducts offer significant advantages over traditional metal ducts:

Thermal Efficiency: PIR foam has a very low thermal conductivity (typically around 0.022W/m·K), which means superior insulation and minimal energy loss for heating or chilled water systems.

Lightweight & Fast Installation: The panels are significantly lighter than metal (often over 70-85% lighter), which reduces structural load and allows for faster fabrication and installation-often quoted as being up to three times faster than metal systems.

Low Air Leakage: When properly sealed, these systems can achieve very high airtightness ratings (Class C or D), which improves system efficiency and reduces energy waste.

Space Saving: The high insulation value allows for thinner duct walls, and the duct can be installed flush to the ceiling without needing an air gap, saving valuable plenum space.

Durability & Cleanliness: The aluminum surface is resistant to corrosion and has anti-bacterial properties, contributing to better indoor air quality (IAQ) and a long service life.

Common Applications of Rigid PIR Pre-insulated Duct

Thanks to its clean and efficient nature, this ductwork is specified for a wide range of buildings, including:

Commercial Offices & Retail Spaces (especially for exposed "architectural" ductwork)

Healthcare Facilities (hospitals, laboratories, clean rooms)

Leisure Centers & Swimming Pools (excellent resistance to moisture and chlorine)

Data Centers (where precise temperature and humidity control are critical)

Technical Specifications of Rigid PIR Pre-insulated Duct

Specification	Typical Value
Core Material	Polyisocyanurate (PIR) Foam
Thermal Conductivity	0.022 W/m·K
Temperature Range	-20°C to +80°C (continuous operation)
Fire Rating	B-s1, d0 (Euroclass) – Limited combustibility, very low smoke & no flaming droplets
Core Density	~53 kg/m³
Max Air Velocity	Up to ~25 m/s
Max Operating Pressure	Up to ~1000 Pa (Positive)