Features of Aosun Insulated Flexible Duct
- Strict production quality control ensures the production of high-quality insulated flexible duct.
- Compliant with multiple standards such as SAA, CE and RoHS, suitable for HVAC and ventilation systems.
- Offering insulated flexible duct in various diameters, lengths, R-values and insulation thickness.
- All insulated flexible duct feature tear-proof, moisture-proof and condensation-resistant performance.
- Customization options are available for OEM/ODM insulated flexible duct.
Aosun | Professional Insulated Flexible Duct Manufacturer in China
Aosun is a leading Chinese manufacturer of insulated flexible duct. Our insulated flexible duct is widely used in HVAC systems and various ventilation systems. It can effectively stabilize air temperature, reduce energy loss, prevent condensation, and improve indoor air quality. Our insulated flexible duct is made of high‑quality multi‑layer materials which has excellent thermal insulation, moisture resistance, and flame retardant performance. It can be used in temperatures ranging from -20°C to 150°C. Its flexible and lightweight structure makes it convenient for transportation and installation. The diameter of the insulated flexible ducts we produce ranges from 4 to 18 inches, which can meet various ventilation requirements. It is suitable for home, commerce, industry, and agriculture. In addition, our insulated flexible duct has passed international certifications such as SAA, CE, ISO, and RoHS, ensuring that every product you purchase is of high quality.
It has excellent air tightness, heat insulation properties and cost-effectiveness. It is easy to install and is suitable for most common ventilation scenarios.
It has excellent corrosion resistance and moisture-proof properties. It is particularly suitable for industrial and humid environments, and can prevent corrosion and damage caused by harsh conditions.
The sound absorption performance of the insulation layer has been improved, which is suitable for spaces with high noise requirements.
Using high-temperature-resistant materials, its applicable temperature range can reach up to 250°C. It is specially designed for industrial high-temperature exhaust and high-temperature ventilation scenarios.
What is an Insulated Flexible Duct？
Insulated flexible duct is essentially an aluminum flexible duct with an added insulation layer. It is a ventilation component mainly used in HAVC systems to convey cold and hot air. The fundamental difference between it and ordinary flexible air ducts is that it adds an insulation layer, which can reduce heat loss during air transportation, prevent the formation of condensate water, and lower noise.
Structure of Insulated Flexible Duct
Insulated flexible duct consists of three layers of structure.
The inner layer of insulated flexible duct is made of aluminum foil, polyester film or PVC. It is supported by spiral steel wires to maintain its circular shape and ensure airtightness. It is the main passage for air transportation, ensuring a stable airflow and preventing any leakage.
The Insulation Layer is usually made of glass wool, polyester wool, cotton or non-woven fabric.As the core layer for heat insulation, it can effectively reduce heat loss during air transportation, prevent condensation water caused by temperature differences, and absorb wind noise to achieve noise reduction effects.
The outer jacket is made of aluminum foil composite film, PE, and PVC. It has the functions of moisture-proofing, tear-resistance and corrosion resistance. It can protect the internal insulation layer and inner pipe from damage by the external environment, and extend the service life of the flexible duct.
Applications of Insulated Flexible Duct
Residential HVAC Systems
Air condition and ventilation duct is easy to accumulate condensate water, which leads to mold growth and indoor air pollution. The heat loss during air transportation will increase the energy consumption of the air conditioner. Insulated flexible duct can effectively prevent the accumulation of condensate water and mold, reduce heat loss, and save energy. Its flexible characteristics are suitable for the complex installation spaces in residential buildings.
Commercial Ventilation
Commercial buildings have large ventilation volumes and long duct distances, which place high demands on noise control. Moreover, the ventilation system is frequently used and consumes a lot of energy, so the air ducts need to have stable performance. The excellent heat insulation performance of the insulation flexible duct can reduce energy consumption and enhance the efficiency of the ventilation system. The insulation layer can absorb noise and minimize the impact of wind noise on the indoor environment.
Industrial Ventilation
Industrial factories usually have harsh working conditions. Some equipment needs to release hot gases, which requires the ducts to have excellent high-temperature resistance. High-temperature-resistant insulation flexible ducts can adapt to high-temperature working environments. PVC insulated flexible ducts have strong corrosion resistance and are suitable for industrial environments that are humid and corrosive. The flexible feature makes it easy to install in the gaps of industrial equipment.
Bathroom/Kitchen Exhaust Systems
There is a lot of moisture and cooking fumes in the bathroom and kitchen, which can easily cause the ventilation ducts to get moldy, corroded and clogged. Therefore, there is a high requirement for moisture-proof performance. The flexible insulation hose has excellent moisture-proof and high-temperature resistance properties, which can prevent the wind ducts from being eroded by cooking fumes and moisture. It can also prevent condensation and avoid the growth of mold, keeping the exhaust duct clean and unobstructed.
Insulated Flexible Duct vs Non-Insulated Flexible Duct
Condensation Phenomenon
The insulation flexible duct is not easy to produce condensation, effectively prevent the generation of condensate water and mold. Non-insulated flexible duct is prone to condensation, which leads to mold growth and condensate water may cause equipment damage.
Energy Consumption
The insulation flexible duct can save energy by reducing heat loss from the air. But air is prone to lost heat during transportation through non-insulated flexible duct, which leads to an increase in energy consumption of the ventilation system.
Application Scenario
The insulation flexible duct can be applied in various scenarios such as residences, businesses, industries, bathrooms, kitchens, and many others. The non-insulation flexible duct is only suitable for conventional ventilation scenarios where temperature difference requirements do not need to be considered.
Initial Cost
The initial cost of the insulated flexible duct is slightly higher, but the subsequent usage and maintenance costs are lower. The initial cost of the non-insulated flexible duct is lower, but the subsequent energy consumption and maintenance costs are higher.
How to Choose Insulated Flexible Duct?
Choosing the right insulated flexible duct requires matching air volume, temperature difference, temperature range, and application scenario to ensure stable performance and energy-saving operation.
Air Volume
The diameter of the insulation flexible duct is directly determined by the air volume. The larger the required air supply volume, the larger the diameter of the air duct. Common specifications include 4 inches to 18 inches (100 millimeters to 450 millimeters). For example, residential HVAC systems have a smaller air supply volume and are suitable for 4 inches to 8 inches air ducts, while commercial ventilation systems with larger air supply volumes are suitable for 10 inches to 18 inches air ducts. We suggest you confirm the air supply volume parameters before choosing the diameter of the air duct.
Temperature Difference
The thickness of the insulation layer depends on the temperature difference between the inside and outside of the duct during use. The larger the temperature difference, the thicker the insulation layer required. Enough thickness can ensure the insulation effect and prevent condensation. The common thicknesses are 12 millimeters, 25 millimeters and 50 millimeters.
Temperature Range
You need to select the insulated flexible duct based on the ambient temperature. The normal type of insulation flexible duct has a temperature resistance range of -30°C to 150°C, which is suitable for most residential and commercial scenarios. If it is used for industrial high-temperature exhaust, you need to choose the high-temperature type of insulation flexible duct to prevent the air duct from being damaged by high temperatures.
Application Scenario
Choose the appropriate material and type according to the use scenario. You can choose aluminum foil insulated flexible duct for residential and commercial HAVC system, choose PVC insulated flexible duct for industrial humid or corrosive environment, choose acoustic insulated duct for a space that is sensitive to noise.
Why Choose Aosun Insulated Flexible Duct?
Choose Aosun insulated flexible duct for HVAC and ventilation systems, you can solve the problems of heat loss, condensation, noise and installation difficulty in one stop. We use high-quality multi-layer materials and strictly control production process, providing standardized and full-size customization services, while taking into account thermal insulation performance, installation flexibility and long-term service life. Whether it is for residential, commercial or industrial scenarios, Aosun can offer you a stable, reliable and energy-saving professional ducting solution, making your HVAC system and exhaust air system operate more efficiently and worry-free.
The commonly R-values for insulated flexible ducts are R4, R6, and R8. The R-value is the capability of insulation and heat preservation. The higher value represents the better insulation effect, less condensation, and more obvious energy-saving benefits. Generally, R4 or R6 insulated flexible ducts are used in residential and commercial buildings. For environments with large temperature differences and harsh conditions, R8 insulated flexible duct is recommended. The choice can be directly made according to the usage environment.
The insulated flexible duct is not better than the rigid duct in all aspects. Insulated flexible duct is softer, easier to bend, and faster to install, which makes it suitable for ceiling installation, narrow spaces, air conditioning fresh air, and short-distance ventilation. However, in long-distance, high-pressure, and heavy-load situations, rigid ducts are more stable. They have lower wind drag and a longer lifespan. So it is recommend to choose the flexible duct in complex spaces, choose the rigid duct in spacious areas.
When installing the insulated flexible air duct, it should be kept smooth and avoid excessive bending. The bending radius should be no less than 1.5 times the pipe diameter to prevent a decrease in air volume. The interfaces should be fixed with special clamps and properly sealed. Supports should be set every 1.5 meters to prevent the pipe from collapsing. When installing, you should reserve a margin to avoid excessive lengthening and ensure long-term stable use.
Sure, but it is not recommended to use it directly outdoors. Its outer protective layer is mainly used for moisture-proofing and tear-proofing indoors. Long-term exposure to sun and rain will accelerate aging and damage, leading to insulation failure, water ingress and mold. If it must be installed outdoors, you need to choose insulated flexible air ducts with ultraviolet protection coatings and ensure proper shielding to guarantee normal use.
Yes. The product design supports elastic compression, which can significantly reduce packaging volume and logistics costs. The compressed state will not damage the inner structure, insulation layer and outer protective layer. After being unzipped on site, it can quickly return to its original shape without affecting the performance and airtightness.
The insulated flexible duct should be sealed by a combination of pipe tightening and sealing tape. After the interface is tightened, use a special metal pipe clamp to evenly lock it, ensuring a secure and non-loose connection. Then, you should wrap aluminum foil sealing tape around the joint to completely cover the gap, which will prevent air leakage and condensation.
Yes. You can cut insulated flexible duct by using a scissors or an artistic knife. After cutting, the edges should be kept smooth. Use the special wire-cutting pliers to flatten the spiral steel wire. Ensure that the insulation layer is not exposed and no air leakage after connection, which will not affect normal use and insulation effect. Be careful not to hurt your hands during the cutting process.
The service life of the insulated flexible duct is generally 10 to 15 years. The specific time mainly depends on the use environment. In a normal dry and well-ventilated environment, it can last for about 15 years. In high humidity and high temperature scenarios, the lifespan will be shortened to 8 to 12 years. Regular cleaning and maintenance can extend its service life.
The daily maintenance of the insulation flexible hose is simple and convenient. You only need to inspect the appearance regularly and keep the pipe straight without any compression. Avoid sharp objects from scratching the outer protective layer and the insulation layer. If there is any minor damage, you should repair it with aluminum foil tape in time. After long-term use, various pollutants may accumulate on the inner wall of the aluminum foil pipe, which will affect the air flow efficiency. So it is recommended that you check and clean the inside of the insulated flexible duct every 1-2 years.
The insulated flexible hose can be used for both air supply and return. It has a stable structure and good air tightness, meeting the routine requirements of air supply and return in air conditioning systems. As long as the pipe diameter, air volume and installation method are matched, the usage effect of air supply and return will be the same, and it will not affect the normal operation of the system.
