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The VMI Air-Pro in-line silencer is a duct accessory that reduces airborne noise traveling through the ventilation duct of a range hood installation, fitted at the inlet and outlet connections of an 8-inch duct run.
A ventilation blower moves air effectively, but the duct itself can carry and amplify the sound of that airflow into the kitchen or into rooms beyond the wall. An in-line silencer interrupts that sound path. Positioned in the duct run between the blower outlet and the exterior termination, it reduces the noise that would otherwise travel freely through the ductwork. The result is a ventilation system that operates without the blower noise dominating the space.
This silencer is sized for an 8-inch duct and connects at both the inlet and outlet, so it seats cleanly into a straight duct run. It is part of the Air-Pro accessory line, making it a natural pairing with Air-Pro ventilation units installed in wood range hood systems. The duct diameter and connection orientation should be confirmed against the ventilation unit and the duct layout before ordering.
This accessory suits installations where the ventilation unit is performing well on airflow but blower noise through the duct is noticeable in the kitchen or in adjacent rooms. It is most relevant in open-plan kitchens, where sound travels freely, and in higher-CFM installations, where the blower runs at a speed that generates more duct noise. Designers specifying a wood hood system for a quieter kitchen environment, and cabinet shops completing an Air-Pro hood build, will find this silencer a straightforward addition to the ductwork plan.
This silencer is sized for an 8-inch duct, with both inlet and outlet connections at that diameter.
In-line silencers are designed to attenuate sound while allowing airflow to continue through the duct. Specific airflow impact figures are not provided in the source data for this unit; confirm performance requirements with the ventilation system specification.
This is the silencer accessory only. The Air-Pro ventilator or power pack that moves the air is a separate unit, ordered by model to match the hood and duct configuration.
It installs in-line within the duct run, connected at the inlet and outlet, between the blower and the exterior duct termination.
When airflow is handled and the remaining issue is duct noise, this Air-Pro silencer is the targeted fix: one in-line component that brings the sound level down without changes to the ventilation unit itself.