Acoustic Flexible Duct 4″,6″,8″,10″,12″,14″,16″ (110mm to 400mm) HVAC duct muffler silencing tube hose
$1.90 ( Not real price )
Quiet HVAC Acoustic Flexible Duct – 4″/6″/8″/10″/12″/14″/16″ Diameter, Aluminum-soundproof cotton Insulated. Reduces airflow/fan noise , thermally insulated, flexible for easy installation in bedrooms, offices, studios, and hotels.
Acoustic Flexible Duct is a multi-layer, bendable HVAC duct designed to reduce airflow and equipment noise while retaining thermal insulation. It features a perforated aluminum inner core, sound-absorbing cotton insulation, and a durable aluminum-polyester outer jacket, enabling flexible installation and effective noise attenuation in ventilation systems.
Product Information
| Item | Details |
|---|---|
| Model | Acoustic Flexible Duct |
| Sizes (Diameter) | 4″ (110mm), 6″ (160mm), 8″ (200mm), 10″ (250mm), 12″ (300mm),14″ (350mm), 16″(400mm) |
| Length | 0.5m or 1m (The length without compression）（length can be customized) |
| Materials | Inner: Perforated aluminum foil; Insulation: soundproof cotton; Outer: Aluminum-PVC laminate |
| Features | Flexible, insulated, noise-reducing, easy installation |
| Layer (from inside out) | Material (per diagram) | Function |
|---|---|---|
| 1. Inner Liner | Aluminum foil | Forms a perforated, corrosion-resistant inner surface to guide airflow, while also reflecting sound waves back into the insulation layer for absorption. |
| 2. Sound-Absorbing Core | Soundproof cotton | The primary noise-reducing layer. This soft, porous material traps and dissipates airflow and fan noise, significantly reducing duct-borne sound transmission. |
| 3. Support Structure | Steel wire frame | A coiled steel wire that maintains the duct’s circular shape under airflow pressure, preventing collapse while allowing the duct to bend and flex. |
| 4. Intermediate Barrier | Aluminum foil | Adds an extra layer of thermal insulation, reducing heat loss/gain in the duct. It also acts as a vapor barrier to prevent moisture from reaching the soundproof cotton. |
| 5. Outer Jacket | PVC film | A durable, flexible, and tear-resistant outer layer that protects the internal components from dust, moisture, and physical damage during installation and use. |
Applications
- Residential Bedrooms & Living Rooms: Minimizes HVAC fan/airflow noise for quiet living spaces。
- Offices & Conference Rooms: Reduces ductborne noise to maintain productive, quiet work environments。
- Recording Studios & Theaters: Critical for low-noise HVAC in acoustically sensitive spaces。
- Hotel Guest Rooms: Ensures quiet ventilation for guest comfort and satisfaction。
- HVAC Fan/Air Handler Connections: Decouples vibrating equipment from rigid ducts to block structure-borne noise。
FAQ
What makes this different from standard insulated flexible duct?
It has a perforated inner core that lets sound enter the insulation layer for absorption, whereas standard duct has a solid inner core for thermal efficiency only.
Can I use it outdoors?
For indoor use only; the outer jacket is moisture-resistant but not UV-stabilized for long-term outdoor exposure.
What is the maximum airflow speed it can handle?
Up to 4,000 FPM (20 m/s); avoid excessive velocity to prevent increased noise.
Is professional installation required?
No—cut to length with scissors, attach ends with clamps/tape; follow airflow direction markings for best performance.
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