Four types of flexible ducts are available for customers needs, including:
Insulated Flexible Duct ( ordinary type & soundproof type)
Flexible Air Duct (core only)
Combined Flexible Duct
PVC Flexible Duct

Advantages:
*Fire resistant flexible duct.
*Easy to install and modify fittings
*Easy to cut and connect
*Easy to transport and storage
*Guaranteed high quality fabrication
*Hight quality of glass wool for good insulation
*Able to reach places that duct could not reach
*Helps to reduce noise
*Low friction loss if calculated an installed properly
*Cheap installation cost

Please see the detail specification by below:

Insulated Flexible Duct

Made of flex. Air duct covered by fiberglass
Insulation and aluminum/polyester laminate jacket.

Standard 10m compressed into carton boxes up to 1.1m.

Technical Parameters
Diameter range: 80-750mm(3"-30")
Temperature range: -30C-140C
Velocity of air flow (max. ): 30m/s
Working pressure (max. ): 2500PA
Glass fiber think: 25mm
Glass fiber density: 20kg/m3
Standard length: 10m

Fire Resistant: M1 standard