​Product Overview
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H-VAX Combi Flexible Duct with Polyester Insulation is a high-performance insulated flexible duct designed to provide both thermal and acoustic insulation in H-VAX and ventilation systems.
The duct features a multi-layer construction consisting of a durable PVC outer jacket, a compressed polyester insulation layer for thermal and sound insulation, and an inner laminated aluminum core reinforced with a high-strength steel wire helix. This combination delivers excellent flexibility, durability, and reliable airflow performance while reducing heat loss and noise transmission.
Its lightweight construction and integrated insulation make it an ideal solution for modern H-VAX installations where energy efficiency, fast installation, and long-term performance are essential.

• Heating and cooling systems
• Air conditioning systems
• Ventilation systems
• Chimney and exhaust air systems
• Residential buildings
• Commercial buildings
• Hotels and hospitality facilities
• Office buildings
• Industrial ventilation systems

Applications​​​​​​​

• Multi-layer insulated flexible duct construction
• Provides effective thermal and acoustic insulation
• Durable PVC outer jacket for added mechanical protection
• Compressed polyester insulation minimizes heat transfer and noise transmission
• Reinforced aluminum inner core ensures structural stability and efficient airflow
• Flexible and easy to install in confined spaces
• Resistant to tearing and deformation
• Suitable for low- and medium-pressure H-VAX systems
• Lightweight and easy to handle
• Helps improve energy efficiency and indoor comfort

Key Features & Benefits

Installation

H-VAX Combi Flexible Duct is designed for fast and efficient installation using standard H-VAX connectors and sealing accessories. Its flexible, factory-insulated construction simplifies installation while ensuring reliable thermal and acoustic performance in residential, commercial, and industrial H-VAX systems.

Technical Specifications

Material: Aluminum + Compressed Polyester Insulation + PVC
Type: Flexible Insulated Duct
Insulation Thickness: 2 mm
Available Sizes: 3" to 22"
Thermal Conductivity: 0.034 W/m·K
Operating Temperature: -30°C to +110°C
Maximum Operating Pressure: 3000 Pa
Physical Properties: Flexible, tear-resistant, and deformation-resistant
Fire Classification: Slow-burning and self-extinguishing
Packaging: 6 m per carton