Hon&Guan 4'' Insulated Flexible Duct 8 FT Long, Black Noise Reducer Hose Silencer for Inline Duct Fan of Air Conditioner HVAC Ventilation System.
Condition: New
$34.99
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Availability:
In Stock.
Arrives
Thursday, Nov 5
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At a glance
- Condition
- New
- Size
- 4" X 8 FT
- Color
- Black
- Material
- PVC
- Maximum Pressure
- 2500 pascal
- Nominal Wall Thickness
- 27 mm
- Outside Diameter
- 4 in
- In the box
- 2PCS Clamps
Features 5
- Noise Reducer&Absorption:The internal structure of glass wool is fluffy and the overall density is large, noise can be reduced by allowing some of the sound waves to escape through the holes rather than reflecting, can decrease the noise by up to 50%
- Thermal Insulation:This Flex Duct is intended to be used in heat preservation, cooling, ventilation, with a good thermal insulation performance, works well with your portable ac device, temperature endurance range from -22F ~ 302 F (-30C ~ 150C)
- Four Layer Protection:Heavy-duty four layer protection design, 1 * PVC+2 * aluminum foil+1 * centrally glass wool with 2 clamps, and the outermost layer of this insulated flexible duct can prevents cute pets from biting and breaking
- Anti-Corrosion & Durable:Thick layer of PVC&2 layers of Aluminum on this flexible ducting prevents gas leaks effectively. Works with extractor and exhaust inline duct fans, carbon filters, also be used as a boat blower hose
- Variety of Applications:Hon&Guan insulated flexible duct is suitable for HVAC system. It will move and deliver air in Kitchens (cooking exhaust), Green Houses and Grow Rooms (Air Circulation, Intake, Exhaust and Light Fixture Cooling), Bathrooms (Smell and Moisture Exhaust), Dryer Rooms, Grow Tents and other applications etc
Description
Absorb Vibration and Noise The porous structure can absorb vibration energy and weaken thepropagation of sound waves, playing a role in shock absorptionand noise reduetion, cspecially in industrial pipelines. Prevent the Formation of Condensation In an onvironment with a large temperature difference, the poresin the insulation hose can reduce the rapid oxchange of heat,thereby avolding the generation of candonsation due to a suddondrep in curtace tomparature, which holps protoct the pipolins. It is used in grow tents in combination with fan, which has the function of ventilation and brings better growth environment to plants. It is applied to the exhaust of kitchen range hood. It has good corrosion resistance and flexibility. It can be bent at will, which brings great convenience to the installation work. With outstanding noise and vibration reduction performance, it is widely used in industrial ventilation, exhaust and equipment systems to create a safer and more comfortable workplace Hon&Guan is a young and passionate brand, which focuses on high-quality ventilation products and accessories. Hon&Guan always promises good design an prioritizes our customer first
Specs 15
| Brand | Hon&Guan |
|---|---|
| Material | PVC |
| Color | Black |
| Product Dimensions | 4"W |
| Maximum Pressure | 2500 pascal |
| Nominal Wall Thickness | 27 millimeters |
| Outside Diameter | 4 inches |
| Item Length | 8 feet |
| Manufacturer | Hon&Guan |
| Number of Packs | 1 |
| Item Dimensions L x W | 4"W |
| Material Type | PVC |
| Brand Name | Hon&Guan |
| Unit Count | 1 Count |
| Item Type Name | Insulated Flexible Duct |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Nov 5
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Excellent quality and surprisingly effective
Size: 4" X 4 FT
Color: Black
I bought this to vent the hot air from my PC directly outside through a window, and it has worked perfectly. The insulation noticeably reduces both heat transfer and fan noise compared to a standard aluminum duct. The material feels thick and durable, yet it's still flexible enough to route around tight spaces without kinking. Installation was straightforward, and the duct holds its shape well once positioned. The build quality exceeded my expectations, and it feels like it will last for years. If you're looking for a well-made insulated duct for ventilation or exhaust applications, I highly recommend this one. Great value for the price!
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Reviewed in the United States on July 27, 2026 by Loc M.
Huge improvement over regular duct
Size: 6" X 8 FT
Color: Gray
Purchased for a portable AC exhaust hose replacement. Works GREAT! Gets barely warm to the touch, when the old exhaust hose was extremely hot and radiating heat back into the room. AC is a little quieter too. Can't recommend this insulated duct highly enough, I can't believe I had been undermining my AC's efficiency for years with a non-insulated exhaust duct. The duct itself feels very well-made, each end has a short length of reinforced foil which fits under the included hose clamps perfectly. Insulated outer duct begins a few inches later, and the outer duct material feels very durable and flexible. The inner duct acts as the support and the outer duct holds the insulation in place, and the result is a dramatic drop in outer duct temp. AC has been running for a few hours now the outer duct is no hotter. I think we have a winner.
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Reviewed in the United States on July 14, 2024 by Morgan C.
Good noise reduction.
Size: 4" X 4 FT
Color: Gray
Significantly reduced the rumble noise from my dryer hose. Installed easily. Well made. Very flexible. Seems to be robust, shouldn't tear unless under extreme abuse. Reasonably priced.
Reviewed in the United States on May 24, 2026 by M. Humphrey
Excellent for RV diesel heater hose
Size: 4" X 8 FT
Color: Black
Pros: Overall quality and ease of installation. Insulation is thick. Cons: The inner foil is thin, which made connecting it with the hose clamps a challenge without tearing it. This would hands down be a 5-start if the inner foil were thicker.
Reviewed in the United States on November 26, 2025 by T. Porter
Good quality
Size: 4" X 8 FT
Color: Black
Well made product. Used the flex duct to vent discharge air from a portable in camper, works perfectly.
Reviewed in the United States on July 30, 2026 by kim
On tie delivery
Size: 6" X 8 FT
Color: Gray
Excellent service & high quality.
Reviewed in the United States on September 8, 2026 by Victorino I Vellucci
Don’t buy this, there’s no insulation.
Size: 6" X 8 FT
Color: Black
If there’s any insulation, I can’t find it. More than deception…I’ve had to use it because I can’t wait for something that is truly insulated. I will have to insulate the tube some other way.
Reviewed in the United States on June 21, 2026 by Jim D Adcock
Excellent Upgrade for Portable Air Conditioner
Size: 6" X 8 FT
Color: Gray
The stock hoses for my portable (two-hose!) air conditioner had disintegrated, and I've long been considering buying a set of insulated hoses for it ever since I bought the unit. I'm honestly surprised that they were not insulated at all out of the box. As such, I bought two of these hoses in 6"x8'. Installing them onto the original hose adapters was a bit of a task, entailing very liberal application of duct tape. This done, I connected them up and powered the unit up. I did not buy these hoses with the intent of being quiet, but I was honestly and pleasantly surprised by how much quieter the condenser side fan was now. I can barely hear it anymore, and it quickly subsides under the sound of the compressor once pressure builds. With the original hoses, it was easily the loudest part of the entire air conditioner. I cannot measure the thermal performance directly versus the original hoses, due to the original hoses having disintegrated years ago as of me writing this review. However, I can definitely say that, before, it was actually hot behind the unit. With these, it's significantly cooler, and the unit's performance has significantly improved. It can now actually cool my garage! Something it used to struggle with. The hoses have also survived from a durability standpoint significantly better than the original plastic hoses. Although they ARE a little less convenient to store when the air conditioner's not in use thanks to their bulk. That's the only "negative", other than the admittedly improvised installation, that I can even say about them. Final Answer: If you have a portable air conditioner and use it with any regularity, upgrade it to insulated hose(s) now. You will not regret it.
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Reviewed in the United States on September 18, 2021 by Josh