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Duct-borne noise happens when HVAC systems carry sound into other areas while reflections in mechanical spaces make it feel louder. The most effective solution is a barrier + absorber composite system that controls both duct transmission and internal echo. In Oregon, facilities must meet OSHA limits of 85 dB (8-hour TWA).
The Hidden Path of HVAC Noise
In many buildings, noise shows up far from where it starts.
HVAC systems operating at 70–90 dB can:
- Carry sound through ductwork
- Release noise into adjacent rooms
- Reinforce it through reflections in mechanical spaces
This creates a spread-out, hard-to-trace noise problem.
Why It’s Hard to Fix
Most solutions only address part of the issue:
- Absorption → reduces echo, not duct travel
- Barriers → block locally, not across the system
Best Solution: Control Movement + Reflection
AcuvaCoreâ„¢ 25 (ANC-ACV-25-B45) is designed for this exact problem.
- Barrier + absorber composite system
- Limits noise through ducts
- Reduces internal buildup
- Flexible for HVAC layouts
Instead of chasing noise, it controls how it spreads
Application
- Wrap ductwork near noise sources
- Treat mechanical room surfaces
- Seal all gaps and connections
Creates a controlled acoustic pathway.
Results + Compliance
With proper installation:
- Noise reduced from 85–90 dB → 60–65 dB
- Reduced noise transfer between spaces
- Improved comfort in occupied areas
Supports OSHA standards:
- 85 dB (Action Level – 8-hour TWA)
- 90 dB (Permissible Limit – 8-hour TWA)
Final Takeaway
HVAC noise doesn’t stay in one place—it travels.
To control it effectively, you need:
- Barrier + absorber system
- Treatment of ducts and reflective surfaces
- OSHA-compliant noise levels
Why does HVAC noise travel through ducts?
Because ducts act as channels that carry sound into connected spaces.
How Do You Reduce Duct-Borne Noise?
- Install a barrier + absorber composite system
- Treat ducts and mechanical rooms
- Control both transmission and reflection
