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� � I <br /> � , <br /> � ,�� MECHANICAL SYSTEM INSULATION <br /> ,I ; I <br /> SECTION 15250 <br /> � I <br /> � 4. Approved Manufacturers and Trade Names <br /> � <br /> � � �� a. Certainteed-"Universal" <br /> � i i b. Manville Corp. -"Microlite" <br /> c. Owens Corning-"Duct Wrap" <br /> I � � d. Approved Equal. <br /> � I <br /> i B. Type G -Duct Liner: <br /> 1. ASTM C971-82, Type II, Grade 2, 1"thickness, 1.5 Ib. density bonded mat of glass <br /> I � � fiber coated with black fire resistant coating, complying with TIMS AHC-101. <br /> � i Moisture adsorption shall not be greater than 0.5% moisture by volume when <br /> � � I exposed to moisture laden air at 120°F and 96% RH, per ASTM C553. Insulation <br /> , ! shall be "Aeroflex Ductliner" as manufactured by Owens Coming Fiberglass Corp. <br /> i ! � or"Ultralite with Certa-Edge"by Certainteed Corp. or equal by Knauf Fiberglass. <br /> 2. Duct liner shall adhesive shall comply with ASTM C916 "Specifications for <br /> � Adhesives for Duct Thermal Insulation". <br /> � � 3. Liner Fasteners: Mechanical or weld secured fasteners for duct liner where finish <br /> ; ' I of duct is not exposed. For exposed ductwork, except in mechanical rooms, <br /> Ii I provide adhesively secured fasteners. Position fasteners are recommended by <br /> � ' ' SMACNA. <br /> ,� ; 4. Minimum Sound Absorption coefficients shall be: <br /> I <br /> � 125 250 500 1000 2000 4000 <br /> � � <br /> ' Coelfficient .34 .42 .47 .64 .80 .79 <br /> ; <br /> i <br /> I Attenuation* 3 5 12 24 21 17 <br /> � <br /> ' *=Attenuation in dB per 10 lineal feet, per ASTM E477 ' <br /> i <br /> 2.3 ;METAL JACKET <br /> ' i <br /> �A. Smooth aluminum jacket 0.016 inch thick. <br /> � I <br /> B. Integral polykraft moisture barrier. <br /> � ' I <br /> !C. Banded locking joints with weatherproof sealant. <br /> , I <br /> � I D. Approved manufacturers: <br /> 1. Insul-Coustic <br /> ! 2. Childers Products Co. <br /> 3. Manville Corp. <br /> 4. Pabco Insulation <br /> i 5. Approved Equal <br /> 2.4 ' INSULATION ACCESSORIES <br /> � i A. The following accessories shall be used in the application of the thermal insulations <br /> specified under this Section: <br /> I <br /> � <br /> � i <br /> � (97008-040497) 15250-3 <br /> , � <br /> ' � i <br /> �' � <br /> ' <br /> � i <br />