Division 22 23 Ebook Page 141 QuietR® Duct Liner Board Product Data Sheet

QuietR Duct Liner Board Product Data Sheet operating rooms, delivery rooms, recovery rooms, nurseries, isolation rooms and intensive care units, terminal filters of at least 90% efficiency should be installed downstream of lined ducts. Lined ductwork supplying clean rooms should have terminal filtration of the efficiency required for the particular class of clean room. To avoid damage to the duct liner due to physical abuse caused by maintenance personnel working in accessible plenums, some means of duct liner protection must be employed. To prevent itching and short-term irritation to skin and eyes, normal work clothing (long-sleeved shirts, long pants, gloves, and safety glasses) is recommended. In addition, use a properly fitted and approved disposable dust respirator when installing or removing this product in poorly ventilated spaces, when fabrication involves power tools, or in any dusty environment. Use of QuietR Duct Liner Board is not recommended for the following applications: With wood or coal fired equipment, or equipment of any type which does not include automatic maximum temperature controls and where operating temperatures of 250F (121C) may be exceeded. In kitchen or fume exhaust ducts, or ducts conveying solids or corrosive gases. In any application where the duct liner may come in contact with liquid water (such as cooling 0 to 2,500 fpm velocity (0 to 12.7 m/s) A B C D 4" 3" 12" 18" (100mm) (75mm)(300mm)(460mm) 2,501 to 6,000 fpm velocity (12.7 to 30.5 m/s) A B C D 4" 3" 6" 16" Metal nosing (channel or zee) must be used where liner is preceded by unlined metal. Otherwise, when air velocity exceeds 4,000 fpm (30.5 m/s), use metal nosing on all upstream edges of duct liner. Figure 1 Acoustic Performance Tested Values - QuietR Duct Liner Board Thickness (in) Sound Absorption Coefficients at Octave Band Center Frequencies (Hz) 125 250 500 1000 2000 4000 NRC 1.0 (25) 0.04 0.26 0.63 0.91 0.99 0.70 2.0 (51) 0.11 0.64 1.12 1.14 1.06 1.08 1.00 NOTE - Acoustical Performance: These data were collected using a limited sample size and are not absolute values. Reasonable tolerances must therefore be applied. All tests were conducted in accordance with ASTM C 423, Mounting A (material placed against a solid backing). For more information, call your Owens Corning Sales Representative. Insertion Loss, dB per ft. of Lined Duct P/A, ft/ft 2 1" Liner 2" Liner Octave band center frequencies, Hz Octave band center frequencies, Hz 125 250 500 1000 2000 4000 125 250 500 1000 2000 4000 8 0.6 1.5 2.7 5.8 7.4 4.3 0.8 2.9 4.9 7.2 7.4 4.3 6 0.5 1.2 2.3 5.0 5.8 3.6 0.6 2.3 4.2 6.2 5.8 3.6 4 0.4 0.8 1.9 4.0 4.1 2.8 0.5 1.6 3.5 5.0 4.1 2.8 2 0.2 0.5 1.4 2.8 2.2 1.8 0.3 0.8 2.3 3.3 2.0 1.7 1 0.1 0.3 1.0 2.0 1.2 1.2 0.2 0.5 1.8 2.3 1.1 1.1 Data extracted from ASHRAE Handbook, HVAC Applications, Chapter 43 P/A = Duct Perimeter, (ft)/Duct Cross Sectional Area (ft2). Example: 12" x 24" duct, P/A = 3 ft/ft2.

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