Product Overview
Brand: TroyStudio
Features:
- 【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-ABSORPTION, VERSATILE】 This inline duct fan silencer is made from non-toxic, odor-free foam. It features superior moisture absorption. 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
