AC Infinity 8" Inline Duct Fan Silencer — Galvanized Steel, Neoprene Foam Muffler for 8in Ducts, Reduces Noise up to 50%

AC Infinity 8" Inline Duct Fan Silencer is a galvanized-steel duct muffler with neoprene egg‑crate foam and dual aluminum flanges designed to cut inline fan noise by up to 50% while maintaining airflow.

Engineered for inline fans used in grow tents, bathrooms, and HVAC runs, this 8‑inch silencer reduces tonal and broadband noise from fan motors and turbulent airflow. Its combination of sound‑absorbing materials and rigid outer shell reduces vibration transfer and resists corrosion and temperature stress. The unit is compact enough to install inside duct runs yet robust enough for repeated installs and seasonal use.

How does the muffler reduce fan and airflow noise?

The silencer uses layered acoustic design to interrupt and dissipate sound energy produced by the fan and moving air. An internal egg‑crate neoprene foam traps and converts sound waves, while the dual aluminum flanges decouple the muffler from the fan, reducing vibration transmission to the ductwork.

• Egg‑crate neoprene foam for broadband sound absorption.
• Dual aluminum flanges to isolate mechanical vibration.
• Galvanized steel casing reflects and contains internal noise.
• Optimized internal length (14.75") for mid‑ and high‑frequency attenuation.

Will this fit my existing duct system and inline fan?

Yes, the silencer is sized for an 8‑inch duct opening and installs inline like a length of duct. The flanges align with standard 8" ducting; verify duct inner diameter and clearance for the 14.75" total length before purchase to ensure a proper fit.

• Duct opening diameter: 8 inches — matches standard 8" ducting.
• Total length: 14.75 inches — plan for inline clearance.
• Weight: approximately 6.00 pounds — sturdy but manageable for typical mounts.
• Flanges accept common clamps, screws, or duct tape for installation.

How durable is the silencer in humid or warm environments?

The body is constructed from galvanized steel for corrosion resistance and thermal stability, while the closed‑cell neoprene foam tolerates humid conditions better than open‑cell materials. Together, these materials provide long service life in grow tents, bathrooms, and many HVAC applications.

• Galvanized steel resists rust and withstands temperature variations.
• Neoprene foam remains dimensionally stable in humid environments.
• Robust build suitable for seasonal or continuous operation.

How will this affect airflow and fan performance?

Designed for inline placement, the muffler minimizes pressure drop while focusing on noise attenuation. Its profile balances acoustic treatment with an unobstructed airflow path to avoid significant reductions in fan CFM when matched with properly sized ducting.

• Internal geometry preserves airflow to limit static pressure increase.
• Best used with fans rated for 8" duct systems to maintain performance.
• Install straight runs before and after the silencer to reduce turbulence.

Who is this for: The AC Infinity 8" Inline Duct Fan Silencer is intended for hobbyists and pros who need quieter inline ventilation—growers, bathroom vent installers, home HVAC improvers, and anyone retrofitting noisy inline blowers. If you want a compact, corrosion‑resistant muffler that reduces fan noise without major airflow penalties and fits standard 8" ducting, this model is a practical choice.