TroyStudio  Air Vent Noise Reducer Foam Insert, Extended 4 Inch Exhaust Duct Silencer-Inline Return Airflow Ventilation Sound Damper Plug for HVAC Tube,Pipe,Air Conditioner,Bathroom Fan,and Grow Tent

★★★★☆ 4.0 125 reviews

$90.00
Price when purchased online
Free shipping Free 30-day returns

Sold and shipped by www.verifydependents.com
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here.
$90.00
Price when purchased online
Free shipping Free 30-day returns

How do you want your item?
You get 30 days free! Choose a plan at checkout.
Shipping
Arrives Apr 18
Free
Pickup
Check nearby
Delivery
Not available

Sold and shipped by www.verifydependents.com
Free 30-day returns Details

Product details

Management number 213616169 Release Date 2026/04/12 List Price $36.00 Model Number 213616169
Category
  • 【SPECIFICATION】Dimensions: 4.05" outer diameter × 4" length - fits all standard 4-inch ventilation ducts perfectly; Material: High-density polyurethane foam (25 kg/m³) with acoustic perforated structure; Performance: Delivers efficient sound absorption while maintaining smooth, unobstructed airflow; Customization: Includes 9 removable foam strips to fine-tune noise reduction and airflow to your needs
  • 【SPECIALLY ENGINEERED FOR DUCT NOISE REDUCTION】: Duct noise originates from three sources: airflow friction against duct walls, internal echo reflections, and collisions at elbows or joints. This duct attenuator utilizes dual acoustic mechanisms: Sound Absorption - Dense foam absorbs acoustic energy. Sound Diffusion - The acoustically perforated structure disperses sound waves, effectively reducing reflection and resonance further. Together, they greatly dampen noise and keep airflow stable
  • 【MAXIMUM NOISE CONTROL】: The 4" long foam core of this tube muffler extends the sound-wave path to maximize energy dissipation. Its 4.05" outer diameter ensures a snug fit in standard 4" ducts—eliminating gaps and sound leakage. For best results, install it at key locations: near the fan to suppress noise at the source, at supply or return vents to block sound intrusion into indoor spaces, and at duct elbows or junctions to reduce collision noise
  • 【ECO-FRIENDLY, MOISTURE-RESISTANT, VERSATILE】 This inline duct fan silencer is made from non-toxic, odor-free foam. It features superior moisture resistance. In high-humidity environments, it absorbs and releases moisture quickly, preventing water buildup and ensuring consistent ventilation performance. It perfectly fits HVAC system, ERV unit, grow tent, kitchen range hood, bathroom exhaust fan, dryer vent, and diesel heater duct—ideal for home, hotel, restaurant, and compressor enclosure
  • 【EASY INSTALLATION & AIRFLOW REGULATION】 Quick and simple to install. Step 1: Push the pipe silencer foam insert directly into the duct; its elastic body will form a snug contact with the inner wall for great sealing and noise blocking. Step 2: Customize performance by adding or removing foam strips to balance noise control and airflow for your specific needs

Brand Name TroyStudio
Item Weight 16 ounces
Manufacturer TroyStudio

Correction of product information

If you notice any omissions or errors in the product information on this page, please use the correction request form below.

Correction Request Form

Customer ratings & reviews

4 out of 5
★★★★☆
125 ratings | 51 reviews
How item rating is calculated
View all reviews
5 stars
75% (94)
4 stars
8% (10)
3 stars
4% (5)
2 stars
2% (3)
1 star
11% (14)
Sort by

There are currently no written reviews for this product.