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Description:
Superior thermal insulation with non-toxic polyester fiber insulation
Aluminum or PVC outer jacket resists moisture and dust effectively
Flame spread resistance compliant with ASTM D635, improving fire safety
Flexible and easy to install, ideal for confined spaces
Withstands high working pressure > 2500 Pa, durable over time
Suitable for hospitals, cleanrooms, factories, and residential buildings
Long service life, low maintenance, cost-efficient in the long term
International quality standards, trusted Prodetech brand
Parameter:
| Product code | OMCNB |
| Flame Spread Resistance: | ASTM D635 ; UL 94 |
| Duct Diameter Range | D100 mm – D400 mm |
| Bending Radius | 0.54*D (mm) |
| Operating Temperature | -30°C to 150°C — ASTM D4591 |
| Maximum Air Velocity | 30 m/s |
| Working Pressure | > 2500 Pa ; t = 2h |
| Water Vapor Permeability | 1.15 ng/N·s — ASTM E96 |
| Tensile Strength | 22 N/cm² — ASTM D774 |
| Standard Length | 8 meters |
Polyester insulated flexible duct is a type of HVAC duct constructed from double-layer aluminum foil bonded with reinforced steel wire, providing excellent flexibility and durability. The core insulation layer is made of non-toxic polyester fiber, while the outer surface is reinforced with fiberglass fabric, which remains stable under normal operating conditions.
Aluminum foil thickness: 0.02 – 0.03 mm
Air passing through the duct maintains a stable temperature thanks to the surrounding polyester insulation layer. This helps minimize thermal loss and prevents condensation, reducing the risk of mold growth and corrosion within the HVAC system.
The duct structure plays a critical role in determining performance and durability. Polyester insulated flexible ducts are engineered with multiple specialized layers to optimize insulation, airflow protection, and resistance to external factors.
The outer jacket is made of reinforced aluminum fabric or PVC, offering high durability and elasticity. This layer protects the inner structure from dust, moisture, UV exposure, and mild chemical environments.
Aluminum foil thickness ranges from 0.02 mm to 0.03 mm, meeting HVAC industry standards.
This core layer provides thermal insulation. Polyester fiber is eco-friendly, non-toxic, and non-irritating, with better moisture resistance than fiberglass insulation. It does not decay in humid environments, making it ideal for cleanrooms and hospitals.
The spiral steel wire maintains duct shape and flexibility, allowing easy bending while preserving structural integrity. This is essential for installations in tight spaces and complex routing layouts.
Tensile strength complies with ASTM D774, ensuring stable mechanical performance and pressure resistance.
Advanced anti-microbial treatment prevents mold and bacterial growth, extending system lifespan and improving air hygiene.
Polyester insulation stabilizes airflow temperature and reduces thermal loss, helping HVAC systems operate efficiently and lower energy consumption — especially in 24/7 commercial buildings.
Unlike fiberglass, polyester fiber does not compress or degrade over time, maintaining consistent insulation performance for years.
The spiral steel structure allows easy bending in tight installation spaces. Manufactured to ASTM D635 and UL94 standards, the duct offers flame spread resistance, enhancing fire safety — critical for high-rise buildings, factories, and data centers.
Polyester insulation does not contain fiberglass, does not release fine dust, and is safe during installation and operation.
Anti-bacterial coating helps prevent mold and microbial growth inside ducts, improving indoor air quality in enclosed environments such as hospitals, offices, and residential buildings.
Reduces clogging risk and prevents damage caused by microbial buildup, helping extend overall system life.
Ideal for sterile environments such as hospitals, operating rooms, and electronic cleanrooms. Anti-bacterial and anti-mold protection helps maintain clean airflow while minimizing energy loss.
Ensures clean, dust-free airflow and stable temperature control. Suitable for operating temperatures from -30°C to 150°C. Widely used in controlled air supply and return systems.
Flexible, quiet, and easy to install, making it ideal for apartments, hotels, offices, and shopping malls. Provides insulation, fire safety, and improved indoor air quality.
Choose the appropriate duct diameter (D100 – D400 mm) based on airflow requirements.
Recommendations:
Avoid undersized ducts that restrict airflow
Avoid oversized ducts that waste cost and space
Install at elevated positions away from obstacles, moisture, and direct sunlight
Do not crush or sharply bend the duct
Secure properly with hangers or supports to reduce vibration
Ensure airtight connections using sealing tape or locking connectors
Do not stretch beyond maximum length (8 m)
Inspect every 6 months, especially bends and joints
Clean using industrial vacuum or damp cloth (no harsh chemicals)
Replace if damaged, moldy, or collapsed
Proper maintenance ensures long-term performance and safe HVAC operation.
