EcoVerb™ Roll - Acoustic Duct Liner
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EcoVerb™ Roll - Acoustic Duct Liner
EcoVerb™ Roll Acoustic Duct Liner is designed to reduce noise inside HVAC systems by absorbing sound from airflow and room-to-room noise through ductwork. This duct liner is made from recycled cotton fibers so making it an excellent, flexible, no-itch, fiberglass alternative that’s easy to install in residential and commercial ductwork. You’ll get cleaner acoustics between rooms and a quieter system overall—without compromising on air quality or fire safety.
Features
- Reduces duct noise – Excellent sound absorption for airflow noise inside HVAC systems
- Recycled cotton fiber – Safe to handle and better for indoor air quality
- Improves system efficiency – R-4 value per inch helps improve duct insulation
- Flexible and easy to install – Conforms to all duct surfaces
- Fire rated and code compliant – Class A Fire Rated and meets NFPA 90A/90B and building codes (ICBO, BOCA, CABO, SBCCI)
- Proudly made in the USA - Sustainable, high-performance acoustic solution
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Specs
Specs
| Full Roll Dimensions | 4' x 100' (1/2") 4' x 50' (1") 4' x 25' (2") |
| Thickness | 1/2", 1", or 2" (Nominal) |
| Density | 1/2": 3.0lbs/cu ft 1" & 2": 1.5lbs/cu ft |
| Weight / Sq Ft | 1/2": ~0.15lbs/sq ft 1": ~0.15lbs/sq ft 2": ~0.25lbs/sq ft |
| Color | Marble blue with black protective facing |
| Thermal Resistance (R-value) | 4.0 per inch |
Material Testing
Material Testing
Noise Reduction Coefficient
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 | NRC |
| 1/2" EcoVerb™ Roll Acoustic Duct Liner | 0.04 | 0.11 | 0.26 | 0.54 | 0.70 | 0.83 | 0.40 |
| 1" EcoVerb™ Roll Acoustic Duct Liner | 0.07 | 0.33 | 0.72 | 0.99 | 0.93 | 0.96 | 0.75 |
| 2" EcoVerb™ Roll Acoustic Duct Liner | 0.35 | 0.94 | 1.32 | 1.22 | 1.06 | 1.03 | 1.15 |
| Tested Properties | Testing Method | Performance |
|---|---|---|
| Operating Limits (Temperature & Velocity) | ASTM C411 | Max 250°F & 5000 fpm |
| Temperature Resistance | ASTM C518 | R-Value: 4.0 per inch |
| Fire Rating | ASTM E84 | Class A |
| VOCs | CDPH Section 01350 | Pass |
| Water Vapor Absorption | ASTM C1104 | Less than 1% |
| Corrosion Resistance | ASTM C739 | Pass |
| Fungal Growth | ASTM C1338, ASTM G21, ASTM C739 | Pass (No growth) |
| Bacterial Growth | ASTM G22 | Pass (No growth) |
Installation Instructions
Installation Instructions
HVAC
- Choose the correct thickness! If the liner is too thick, acoustics material will impede airflow. Small ducts (less than 10") should use the 1/2" thick liner. Larger ducts (12" x 12" or more) should use the 1" thick version. Commercial ducts (18" x 18" or more) use the 2" thickness.
- For additional sound absorption, oversize your ducts (no more than 30%) to allow space for a thicker liner.
- Install the EcoVerb™ Roll acoustic liner with the cotton side facing the inside wall of the duct. The black liner faces out towards where air is flowing. The facing protects the absorptive cotton fibers from airflow.
- Recommended Adhesive: P329 Spray Adhesive, 3M Super 77, or equivalent
- Alternative Application: Install the EcoVerb Roll with insulation stick pins. Use self-locking stick pin washers to secure it and add stick pin dome caps to cover the point.
For more information, read our duct liner install guide!
Common Product Uses
Common Product Uses
- Line HVAC ducts with acoustical liner for air duct noise reduction and reduce heat gain/loss.
- If you do not have full access to the HVAC duct, installing EcoVerb Roll Liner as far down as your arm can reach in each duct will still reduce noise by at least several decibels. If additional sound reduction is needed, contact us for details on how to build a baffle.
Free Shipping Details
Free Shipping Details
| Thickness | Free Shipping - Ground | Free Shipping - LTL Freight |
| 1/2" | 0 - 1199 Sq Ft | 1200+ Sq Ft |
| 1" | 0 - 599 Sq Ft | 600+ Sq Ft |
| 2" | 0 - 399 Sq Ft | 400+ Sq Ft |
Resources
Installation Guides
Spec Sheets
