Acoustical Products Made in USA.
Ductborne HVAC noise occurs when sound travels through air duct systems and can be reduced by applying mass-loaded barrier materials directly to ductwork. Not all noise travels through open space—some of it moves quietly through the systems designed to move air.
On many vessels and industrial facilities in Illinois, HVAC systems become an unexpected pathway for sound. Fans, air handlers, and airflow turbulence regularly generate 75–90 dB(A), but instead of staying localized, that noise enters ductwork and spreads throughout the structure.
What starts in a mechanical room can end up in control areas, workspaces, or even crew cabins—making HVAC systems a hidden source of widespread acoustic issues.
From a compliance standpoint, this matters. Under OSHA standards applied in Illinois:
- 85 dB(A) – Action level (hearing conservation required)
- 90 dB(A) – Permissible exposure limit (PEL)
👉 When duct systems distribute noise across multiple areas, exposure becomes harder to control.
Why HVAC Noise Travels So Far
Unlike direct equipment noise, HVAC sound doesn’t rely on proximity—it uses the duct system itself as a transmission channel.
Here’s how it spreads:
- Moves through duct pathways across long distances
- Escapes at vents and openings into multiple compartments
- Bypasses traditional insulation designed for thermal—not acoustic—performance
Even when machinery is isolated, the duct network continues to carry sound beyond the source.
Controlling Noise Inside the Duct System
To reduce HVAC noise effectively, the focus has to shift to the pathway—not just the equipment.
MassiCore® Marine 90 (ANC-MB90) provides a solution by acting as a flexible, high-mass barrier layer that can be applied directly to ductwork or used within mechanical enclosures.
Why it works:
- Mass-loaded vinyl construction blocks airborne noise transmission
- Flexible design allows wrapping around ducts and irregular geometries
- Suitable for both localized duct treatment and full system integration
By addressing the duct itself, it prevents noise from traveling further into occupied spaces.
Results You Can Expect
When ductborne noise is properly controlled, the improvement is noticeable across multiple areas:
- Noise levels reduced from 85–90 dB(A)
- Down to approximately 60–65 dB(A)
This creates a more stable and comfortable acoustic environment throughout the facility or vessel.
Key benefits:
- Improved alignment with OSHA noise standards in Illinois
- Reduced noise transfer between compartments
- Lower overall fatigue for workers and crew
- More consistent sound control across large systems
Why This Matters in Illinois Facilities
In Illinois—where industrial plants, inland marine operations, and mechanical systems run continuously—HVAC noise often goes unnoticed until it becomes widespread.
Unchecked ductborne sound can lead to:
- Noise complaints across multiple work zones
- Difficulty maintaining compliance across large facilities
- Reduced productivity due to constant background noise
Addressing the duct system directly ensures noise is controlled at both the source and along its path. This makes it one of the most effective HVAC noise control solutions in Illinois for ductborne sound reduction.
