NUOENWEI Three-layer Flexible Insulated Air Duct | 4″–59″ PVC Insulated Ducting for Grain Coolers, Tent AC & HVAC Systems
The NUOENWEI Three-layer Flexible Insulated Air Duct is a professional-grade, high-performance insulated ducting system engineered for the efficient transportation of conditioned air in demanding environments. Featuring a unique triple-layer composite construction—a 0.55mm PVC-coated fabric outer layer, a 3mm composite thermal insulation core, and a 0.4mm smooth PVC inner liner—this flexible duct minimizes heat loss, prevents condensation, and reduces energy consumption.
Reinforced with helical spring steel wire and protected by an external PVC wear-resistant strip, the NUOENWEI insulated air duct delivers exceptional durability, flexibility, and thermal performance. Available in diameters from 4 inches (100mm) to 59 inches (1500mm) and standard lengths of 3m or 10m, it is the ideal solution for grain storage cooling, outdoor tent air conditioning, portable AC systems, and specialty HVAC applications.
NUOENWEI Three-layer Flexible Insulated Air Duct
The NUOENWEI Three-layer Flexible Insulated Air Duct is specifically designed for use with grain cooling units (grain chillers), spot air conditioners, portable HVAC systems, and ventilation fans. Its integrated 3mm thermal insulation layer effectively reduces condensation and energy loss, ensuring that cold or warm air reaches the target zone at near-original temperatures
Related Parameters
| Feature | Specification |
|---|---|
| Brand | NUOENWEI |
| Product Name | Three-layer Flexible Insulated Air Duct |
| Available Diameters (ID) | 4″ – 59″ (100 mm – 1500 mm) |
| Standard Lengths | 3m / 10m (custom lengths available upon request) |
| Total Wall Thickness | 4 mm (±0.5 mm) |
| Reinforcement | Helical spring steel wire (3.5mm diameter; spacing varies by duct size) |
| External Protection | PVC wear-resistant strip over spiral wire |
| Wire-Free Soft Connector | 10 cm at each end with tightening clamps |
| Temperature Range | -15℃ to +80℃ |
| Thermal Conductivity | ≤0.035 W/(m·K) |
| Standard Color | Yellow |
| Available Colors | Gray, White, Blue, Red, Black, Green |
| Certification | ISO9001 |
| Place of Origin | Guangdong, China |
| MOQ | 5 meters |
| Supply Ability | 500,000 meters/year (standard duct); 200,000 meters/year (PCA hose) |
| ODM / OEM | Available |
Product Advantages
1. Superior Three-Layer Thermal Insulation
The 3mm composite insulation core delivers exceptional thermal retention with a thermal conductivity of ≤0.035 W/(m·K). This translates to less than 5% cold loss over standard runs, compared to over 30% loss with uninsulated ducts. The result: reduced compressor cycling, lower energy costs, and extended equipment life.
2. Military-Grade Durability
The 0.55mm PVC reinforced coating, combined with the external PVC wear-resistant strip, withstands punctures, UV radiation (5000+ hours), and extreme temperatures. Lab tests confirm 3.2x higher abrasion resistance than standard PVC (ASTM D3884). This translates to a 38% longer lifespan than standard vinyl ducts in outdoor environments, slashing replacement costs.
3. Crush-Resistant Spiral Steel Wire Reinforcement
The 3.5mm galvanized steel wire helix provides 150kg/m² crush resistance, preventing kinking and collapsing at bends. The scientifically optimized 18cm wire spacing delivers the perfect balance of flexibility and structural integrity—greater than 20cm risks collapse at bends, while less than 15cm creates rigid, difficult-to-install ducting.
4. Airtight Sealing for Zero Leakage
The 10cm steel-free ends paired with 304 stainless steel clamps (BS 1571) create an airtight seal even at 2500 Pa pressure. This prevents the 15-25% air loss commonly measured in traditional metal duct interfaces, ensuring every BTU of conditioned air reaches its destination.
5. Energy Efficiency & Cost Savings
By effectively maintaining the desired temperature of the air throughout the delivery run, this duct reduces HVAC energy consumption by up to 17% for grain coolers and industrial AC systems. The 4mm total thickness (vs. 2mm alternatives) drops cold loss from 22% to just 6%, with ROI achieved in under 14 months in grain cooling applications.
6. Flexibility & Easy Installation
Lightweight and highly flexible, the duct can be compressed for storage, easily extended on-site, and routed around obstacles. The smooth 0.4mm PVC inner liner features an anti-static treatment that prevents grain dust adhesion and ensures consistent airflow.
7. Versatile Color Options
Available in yellow (standard) plus gray, white, blue, red, black, or green—allowing for color-coding by application or integration with existing equipment aesthetics.
8. ISO9001 Certified Quality
Manufactured under strict quality control with ISO9001 certification, ensuring consistent product quality and reliability.
Application Scenario
1. Grain Storage & Silo Cooling
Connect directly to grain cooler units to inject cool, dry air into silos and warehouses. The insulated duct effectively transports cold air produced by the chiller to storage bins, keeping temperatures low to prevent grain spoilage, mold, and insect infestation. Special insulation properties regulate temperature and humidity in the granary to avoid moisture or fermentation of food, ensuring long-term storage safety.
2. Outdoor Tents & Temporary Shelters
Ideal for military tents, event tents, construction site temporary structures, and emergency shelters. The duct connects portable or specialty air conditioning units to the tent interior, delivering conditioned air efficiently while the unit itself remains outside. Weather-resistant construction ensures reliable performance in outdoor conditions.
3. Portable Air Conditioners & Spot Coolers
Extend the reach of portable AC units and spot coolers. The insulated design minimizes temperature loss over extended runs, ensuring that cool or warm air reaches specific target zones—whether cooling server racks, industrial workstations, or temporary office spaces.
4. Specialty Air Conditioning Systems
Engineered for use with specialized air conditioning equipment including grain chillers, warehouse cooling units, and industrial HVAC systems. The duct handles both air supply and suction applications.
5. Agricultural & Greenhouse Applications
Perfect for greenhouse climate control, livestock facility ventilation, and agricultural drying operations. The corrosion-resistant PVC construction withstands moisture and agricultural chemicals.
6. Industrial Ventilation
Suitable for factory floor cooling, warehouse ventilation, and workshop air distribution where temporary or flexible air delivery is required.
Frequently Asked Questions
Contact person: Elaine Guo
Tel.: +8615875732388
E-mail: sales@fsnuowei.com
Add: No. 39 Xingjiao Road, Hecheng Street, Gaoming District, Foshan City, Guangdong Province,China