Features of Aosun Aluminum Flexible Duct
- Made of high-quality metal materials
- Good ventilation and smoke extraction function
- Resistance of water, corrosion and high temperature
- Certified by SAA, TUV, CB, CE, and RoHS
- Offer personalized customization services, including duct diameter, length, etc
Aosun | Professional Aluminum Flexible Duct Manufacturer in China
Aosun is a leading Chinese manufacturer of aluminum flexible duct. Our aluminum flexible duct widely used in HVAC systems and various ventilation and smoke extraction systems. It can effectively promote air circulation, removes polluted air, and improves air quality. Our aluminum flexible duct is made from high-quality metal materials, which has excellent waterproof and corrosion-resistant properties, and can be used in temperatures ranging from -40 to 250 degrees Celsius. Its structure is lightweight, making it convenient for transportation and installation. The diameter of the aluminum flexible ducts we produce ranges from 4 to 12 inches, which can meet various ventilation requirements. It is suitable for home, commerce, industry, and agriculture. In addition, our aluminum flexible duct has passed international certifications such as SAA, TUV, CB, CE, and RoHS.
Lightweight, easy to transport and install.It can be used in general ventilation systems.
It adopts a multi-layer structure manufacturing process, which makes it more heat-resistant, waterproof, and corrosion-resistant.
Reduce heat loss during air supply.It is used in air conditioning systems to deliver cool and hot air.
Specifically designed for HVAC systems, it delivers fresh air and improves air quality.
Upgraded Aluminum Flexible Duct for high-temperature resistance, specifically designed for kitchens and high-temperature factories. It can withstand temperatures up to 250 degrees Celsius.
Upgraded Aluminum Flexible Duct for corrosion resistance. It has passed acid and alkalinity tests, making it suitable for use in chemical plants.
It has a UV-protective coating that effectively blocks ultraviolet rays. Extend the service life of aluminum Flexible Duct outdoors.
It uses fine steel wire as a skeleton and is wrapped in aluminum foil, giving it greater ductility and flexibility, making it suitable for complex ventilation ducts.
What is An aluminum Flexible Duct?
An aluminum flexible duct is a ventilation accessory with a double-helix aluminum composite structure, typically composed of four layers. The inner tube is made of aluminum foil spirally wound around steel wire. The sound-absorbing membrane wraps around the outside of the inner tube, while the sound-absorbing cotton wraps around the outside of sound-absorbing membrane. The coat is the outermost protective structure. These four layers are tightly combined through manufacturing processes to form an aluminum flexible duct that heat preservation, sound absorption, and ventilation.
Advantages of Aluminum Flexible Duct 
Flexible Structure
Aluminum flexible duct is made of aluminum foil, so it is lightweight and easy to transport and install. The inner and outer spiral steel wires provide support, allowing it to bend without bulging or cracking, and making it suitable for complex spaces. The aluminum foil is self-supporting and will not shrink after installation. It can maintain the flatness of the duct and reducing air resistance. The aluminum flexible duct is integrally molded, minimizing air leakage.
Noise Reduction and Absorption
The aluminum flexible duct uses porous sound absorbing materials. Noise spreads through the sound-absorbing structure and decays as the propagation distance increases. Under the combined effect of the sound-absorbing cotton and sound-absorbing membrane, the effect of noise reduction and absorption is achieved.
High Temperature Resistance
The outer aluminum foil has high reflectivity to light and heat. It is flame-retardant. The aluminum flexible duct can withstand temperatures from -40 to 250 degrees Celsius, and can be used in both low and high temperature environments. It has excellent heat insulation properties and can effectively prevent heat loss.
Waterproof and Corrosion-Resistant
Aluminum foil has excellent waterproof properties and can resist corrosion from chemicals.Aosun aluminum flexible ducts have undergone acid and alkali immersion tests, maintaining their corrosion resistance for extended periods without perforation. It has good corrosion resistance and can be used in harsh environments.
Application of Aluminum Flexible Duct
The material used to make aluminum flexible duct gives them both the rigidity of metal and the flexibility of non-metals. Because aluminum foil tubes can be bent freely, they are ideal for ventilation ducts installed in complex structures or ceilings. Therefore, aluminum flexible ducts are suitable for various scenarios such as homes, businesses, industries, and agriculture.
Residential
You can use aluminum flexible duct in the bathroom or kitchen. When you are showering, water vapor is generated. Aluminum flexible is waterproof. When it used with an exhaust fan, it can expel water vapor without leaking and promote air circulation.
Cooking in the kitchen often produces very hot fumes. Aluminum foil is heat-resistant, so connecting it to a range hood allows for effective fume removal without melting due to high temperatures. Compared to plastic duct, aluminum flexible duct is not transparent. So the greasy dirt accumulated inside is not visible, making it more artistically.
Commercial
Aluminum flexible duct is widely used in HVAC systems and fresh air exchange systems, and the two systems are commonly used in commercial environments such as shopping malls, hotels, and restaurants. Aluminum flexible are easy to install and can minimize disruption to business operations. Its unique structure provides shock absorption and noise reduction, allowing for low-noise operation in quiet environments such as hotels and hospitals. Furthermore, its excellent heat preservation properties reduce heat loss when transporting either cold or hot air, thus saving energy when using HVAC or air conditioning systems.
Industrial
In industrial production, chemical plants will generate large amounts of waste gas. It often contains numerous chemical substances. Aluminum foil exhibits a certain degree of resistance to acids, alkalis, and other chemicals, resisting their corrosion. When high-temperature plant require the emission of high-temperature gases, the high-temperature resistance of aluminum flexible duct makes them perfectly suited for this scenario.
Agriculture
Aluminum flexible duct are widely used in agricultural ventilation systems to promote air circulation in greenhouses and growing rooms. And it can effectively remove heat, moisture, and carbon dioxide. This provides suitable temperature and humidity for crop growth. In livestock farms, they also efficiently deliver fresh air and promptly remove harmful gases such as ammonia and hydrogen sulfide, protecting animal health.
How to choose aluminum flexible duct?
When choosing aluminum flexible duct, you need to take into account factors such as duct diameter, usage scenario, and budget.
Duct Diameter
Calculate the airflow to match the duct diameter. For example, a 4 inch aluminum flexible duct is recommended for an airflow of 80-120 m³/h, a 6 inch aluminum flexible duct for 150-250 m³/h, an 8 inch aluminum flexible duct for 300-450 m³/h, and a 10 inch aluminum flexible duct for 500-700 m³/h. You need to make the aluminum flexible duct diameter the same as the fan interface diameter. You can also use an transit joint, but this may increase air resistance.
Usage scenario
For general household use, you can choose a single-layer aluminum flexible duct. It is a cost-effective option. For industrial use, double-layer thickened aluminum flexible duct is recommended. For high-temperature environments, we recommend that you choose aluminum flexible duct with stronger heat resistance. Ensuring it does not melt under high temperatures. Small-diameter aluminum flexible duct is commonly used in residential or other places with general ventilation needs, while large-diameter aluminum flexible duct is commonly used in places with higher ventilation requirements or harsher environments.
Budget
The material of aluminum flexible duct directly determines its cost. Common types include pure aluminum and aluminum alloys. Pure aluminum has excellent ductility and high flexibility, making it suitable for complex ventilation ducts. Aluminum alloys add other metals, which can significantly improve their compressive strength. It is suitable for high-pressure environments. Aluminum alloys are more expensive than pure aluminum，you can choose based on your budget.
| Product Parameters | AFD-100 | AFD-200 | AFD-300 | AFD-400 | AFD-500 |
| Available Diameter | 4 inches | 6 inches | 8 inches | 10 inches | 12 inches |
| Operate Pressure | 2500pa | 3000pa | 3000pa | 3000pa | 3000pa |
| Temperature Range | -25℃~250℃ | -30℃~150℃ | -30℃~150℃ | -30℃~150℃ | -30℃~150℃ |
| Air Velocity | 30m/s | 30m/s | 30m/s | 30m/s | 30m/s |
| Length | 10m/customized | 10m/customized | 10m/customized | 10m/customized | 10m/customized |
| color | silver | black | gold | yellow | blue |
Why Choose Aosun Aluminum Flexible Duct
Aosun aluminum flexible duct has obtained international certifications such as SAA, TUV, CB, CE, and RoHS, ensuring our products meet high quality standards. Aosun offers customization services, you can customize the pipe diameter, number of layers, or enhance heat and corrosion resistance according to your needs. Aosun also provides comprehensive after-sales service, including installation guidance and maintenance advice.
Standard aluminum flexible duct can withstand 130 degrees Celsius. High-temperature reinforced aluminum flexible duct can withstand 250 degrees Celsius. If you need more high-temperature resistant aluminum flexible ducts, it can reach 300 degrees Celsius through special customization.
After prolonged use, various contaminants may accumulate on the inner wall of the aluminum flexible duct, which will affect airflow efficiency. Therefore, it is recommended that you inspect and clean the inside of the aluminum flexible duct every 1-2 years. When you are cleaning, you need remove the aluminum flexible duct. If there are only a few contaminants, you can blow them in from one end using high-pressure air. If there is a significant buildup of contaminants, you can wipe it with an active cleaning agent.
Aluminum flexible duct is in a compressed state when leave factory. When storing, keep the original packaging and avoid squeezing or placing heavy objects on top of the packaging. This is to prevent the aluminum flexible duct deforming. The storage environment should be cool and dry, avoiding direct sunlight. The ultraviolet rays will accelerate the aging of the aluminum foil. Finally, avoiding contact with acids, alkalis, and other chemicals, as well as sharp objects.
First, you need clean all foreign matters from both ends of the aluminum foil tubing and slip the duct over the connector. Then, secure it with metal clamps and tighten it to prevent air leaks. Seal the duct with aluminum foil tape to ensure air impermeability. If the aluminum flexible duct is used for a long distance and is installed suspended, you need use hanger to prop up. Install a hanger every 5 inches to prevent the aluminum flexible duct from sagging.
Single-layer aluminum flexible duct is lighter and more flexible. It is suitable for basic ventilation and environment. Depending on environmental requirements, multi-layer aluminum flexible duct adds thermal-protective coating or protective coating. It provides stronger air leakage prevention and high-temperature resistance. It is suitable for more complex environments.
Yes. You can cut it to the length you need.Its pipe wall consists of aluminum foil wrapped around a steel wire skeleton, so you can cut it with ordinary scissors or a utility knife. When cutting, it’s best to cut into the grooves in the aluminum foil between the wires for a cleaner cut. Also, you need to leave it slightly longer, as the aluminum flexible duct will increase in length after stretching. Be careful not to cut your hands.
Yes, it can. However, you need to use aluminum flexible duct with a UV-protective coating. You can check the product page for a “UV-protective”, “outdoor-use” label. A more economical way is to cover the aluminum flexible duct with a plastic film, which can also effectively resist UV rays and extend the lifespan of the aluminum flexible duct.
Air leaks will reduce the efficiency of the ventilation system. When you notice increased energy consumption, you can use a smoke test to determine if there is an air leak and pinpoint its location. Leaks usually occur at pipe connections. In this case, you can use professional aluminum foil sealing tape to wrap around the leaking area, applying at least three layers.
Generally speaking, with regular cleaning and maintenance, indoor aluminum foil tubing can be used for 8-12 years. Due to prolongde exposure to sunlight and rain, the aluminum flexible duct used outdoors will have a shorter lifespan. It can be used for 5-8 years.
When the following situations occur:
- The surface damage to the aluminum flexible duct is too large and cannot be repaired.
- The aluminum flexible duct is severely deformed and cannot be restored.
- Excessive contaminant accumulate inside the aluminum flexible duct cannot be removed.
