​Product Overview
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​​​​​​​H-VAX Combi Flexible Duct with Elastomeric Insulation is a premium pre-insulated flexible duct designed to provide superior thermal insulation, condensation control, and acoustic performance for H-VAX and ventilation systems.
The duct features a multi-layer construction consisting of a durable PVC outer jacket, a closed-cell elastomeric foam insulation layer, and an inner laminated aluminum core reinforced with a high-strength steel spring wire helix. This unique combination offers excellent thermal efficiency, mechanical protection, and installation flexibility, making it an ideal solution for modern air distribution systems.
Its integrated insulation design reduces heat loss, prevents surface condensation, and minimizes installation time compared with conventional duct insulation methods.

• Heating and cooling systems
• Air conditioning systems
• Ventilation systems
• Chimney and exhaust air systems
• Residential buildings
• Commercial buildings
• Hotels and hospitality facilities
• Hospitals and healthcare facilities
• Industrial H-VAX applications
• Low- and medium-pressure air distribution systems

Applications​​​​​​​

• Multi-layer insulated flexible duct construction
• Closed-cell elastomeric foam insulation for superior thermal performance
• Durable PVC outer jacket for enhanced mechanical protection
• Reinforced aluminum inner core for structural stability
• Prevents surface condensation
• Excellent thermal and acoustic insulation properties
• Flexible and easy to install in confined spaces
• Resistant to tearing and deformation
• Suitable for low- and medium-pressure H-VAX systems
• Reduces installation time and energy loss
• Long-lasting and maintenance-friendly construction

Key Features & Benefits

Installation

H-VAX Combi Flexible Duct with Elastomeric Insulation is designed for fast and efficient installation using standard H-VAX connectors, clamps, and sealing accessories. Its factory-insulated construction reduces on-site labor while delivering reliable thermal performance, energy efficiency, and long-term durability.

Technical Specifications

Structure: Aluminum + Closed-Cell Elastomeric Foam Insulation + PVC
Type: Flexible Insulated Duct
Available Sizes: 3" to 22"
Insulation Thickness: 3 mm
Insulation Material: Closed-Cell NBR Elastomeric Foam
Thermal Conductivity (at 10°C): 0.034 W/m·K
Operating Temperature: -20°C to +105°C
Air Flow Velocity: 25–35 m/s
Maximum Operating Pressure: 3000 Pa
Pressure Drop: Minimum
Condensation Control: Prevents surface condensation under recommended operating conditions
Physical Properties: Flexible, tear-resistant, and deformation-resistant
Fire Classification: Slow-burning and self-extinguishing materials
Packaging: 10 m per carton