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Quiet Liner™ - Natural Cotton Fiber Liner

Natural Cotton Fiber Insulation with anti-microbial fabric facing

Quiet Liner™ is a high-performance natural fiber acoustical duct liner designed to reduce HVAC noise while also improving thermal insulation performance. Made from non-irritating, fiberglass-free fibers, Quiet Liner helps absorb unwanted sound within sheet metal ductwork, reduces heat loss or gain, and provides a safer, easier-to-handle alternative to traditional duct liners. Its durable black fire-resistant facing and antimicrobial treatment help resist microbial growth while maintaining long-lasting performance in commercial and industrial HVAC systems.

Downloads / Product Resources

Product Data Sheet
Technical specifications
Installation
Step by step guide
CSI Specs
Industry standard format
Test Reports
Acoustic, fire and material testing
Sustainability Documents
For projects pursuing LEED, WELL, or LBC
Misc. Data
SDS, warranty, care & maintenance
  • Product Specs

    Applications

    Primary Use is HVAC supply and return duct lining. Other applicaitons include: mechanical room noise control, air handler cabinet lining, VAV box acoustical treatment, fan housing and fan plenum lining, generator room ventilation duct treatment, equipment enclosure sound absorption, compressor room noise reduction, acoustical core for DIY panel builds, recording studio HVAC noise control, theater and auditorium duct attenuation, broadcast and podcast studio ventilation systems, data center and server room HVAC treatment, sound attenuation inside custom acoustic enclosures, industrial process ventilation noise control, OEM equipment cabinet lining, interior lining for acoustic plenums and transfer air paths, noise control inside transportation or mobile equipment enclosures, acoustic lining inside woodworking dust collection systems, sound absorption inside elevator equipment rooms, noise reduction within pump enclosures, acoustical treatment behind perforated metal wall systems, interior absorption layer in custom sound traps and baffle boxes, sound control inside test chambers and equipment mockups, HVAC noise mitigation in churches, schools, restaurants, and open offices, acoustic lining for cleanable utility or maintenance spaces, reduction of metal “oil canning” resonance in large sheet metal enclosures, supplemental sound absorption in prefab modular buildings

    Material Composition

    Natural cotton fiber acoustical core with black antimicrobial bonded to face

    Thickness

    Standard: 1/2", 1" and 2"
    Optional: 1-1/2" (note: minimum order quantity applies, call for details)

    Density

    1/2" thick: 3.0 lbs. pcf
    1", 1-1/2" and 2": 1.5 lbs. pcf

    Size

    1/2" thick: 48" wide x 100' long
    1" thick: 48" wide x 50' long
    1-1/2" thick: 48" wide x 25' long
    2" thick: 48" wide x 25' long

    Color

    Recycled blue cotton fibers with black antimicrobial fabric facing

    Installation Method

    Adhere to surface
    Mechanical fasteners or stick pins

  • Acoustical Specs
    Quiet Liner – Sound Absorption Coefficients
    Mount 125Hz 250Hz 500Hz 1KHz 2KHz 4KHz NRC
    ½″ – 3lb./cf. A .00 .11 .26 .54 .70 .83 .40
    1″ – 1.5lb./cf. A .07 .33 .72 .99 .99 .99 .75
    1½″ – 1.5lb./cf. A .07 .30 .86 1.10 1.05 1.03 .85
    2″ – 1.5lb./cf. A .35 .94 1.32 1.22 1.06 1.03 1.15
  • Thermal Resistance (R-Value)
    Thermal Performance of HVAC Acoustic Insulation
    Tested in accordance with ASTM C518
    PRODUCT K-VALUE C-VALUE R-VALUE
    Thickness
    Inch (mm) BTU×in(h×ft2×°F) W÷(m×°C) BTU×in*h×ft2×°F) W÷(m×°C) R W÷(m×°C)
    ½ (13) .25 .036 .50 2.84 2.0 .35
    1 (25) .25 .036 .25 1.42 4.2 .74
    (38) .25 .036 .17 0.97 6.0 1.06
    2 (51) .25 .036 .13 0.74 8.0 1.41
    The higher the R-Value, the greater the insulating power.
  • Environmental
    Physical Properties of HVAC Acoustic Insulation
    PROPERTIES PERFORMANCE TEST METHOD
    Operating Limits
    Temperature Velocity
    Maximum 250° (121°C)
    5000 fpm
    ASTM C 411
    ASTM C 1071
    Surface Burning Characteristics
    (Fire Hazard Classification)
    Flame Spread Max: 25
    Smoke Developed Max: 50
    Class A / Class 1
    ASTM E 84
    UL 723
    NFPA 255
    Corrosion Resistance Pass – No Growth ASTM G 21
    ASTM C 1338
    ASTM C 739
    Bacteria Resistance Pass – No Growth ASTM G 22
    Water Vapor Absorption Less Than 1% By Weight ASTM C 1104
    Product Compliance of Acoustic Duct Liner
    Quiet Natural Fiber Acoustic Duct Liner has the physical properties that regularly meet the requirements of the following current specifications, standards, and codes.
    FIRE SAFETY STANDARDS
    NFPA 90A Installation of Air Conditioning and Ventilating Systems
    NFPA 90B Installation of Warm Air Heating and Air Conditioning System
    BUILDING CODES
    ICBO International Conference of Building Officials
    BOCA Building Officials and Code Administrators
    CABO Council of American Building Officials
    SBCCI Southern Building Code Congress International