332 SW EVERETT MALL WAY NATIONAL GENERAL INSURANCE 2017-04-06

Mat-Faced Micro-Aire® Fiber Glass Duct Board Type 475& Type 800 Closure Systems Maximum Unreinforced Duct Dimensions In order to meet the requirements of UL 181 for a Class 1 Air Duct Internal Pressure Positive Negative System,closures meeting the requirements of UL 181A must be used Thickness in.water column inches inches with Mat-Faced Micro-Aire.For additional fabrication instruction Type 475 0.5 36 34 information,reference AHS-30 or NAIMA Fibrous Glass Duct 1 1.0 24 22 Construction Standards(www.naima.org). 2.0 15 14 Type 800 0.5 40 38 Closure I 1Y2 2" 1.0 26 22 UL 181A-H Closures 2.0 18 16 Use tapes listed and labeled in accordance with Standard UL 181A Internal Pressure Positive egative m Thickness Pa mm mm and marked"181A-H:'Tapes in compliance with this standard must 125 914 864 be imprinted with this information.Heat seal all longitudinal and Type 47525 mm 249 610 559 circumferential joints according to tape manufacturers'recommendations. 498 381 356 Center strip over the edge of stapling flap.Staples are not required 125 1016 965 when automatic closure equipment is used for the longitudinal joint. T38 e 51 mmm 8249 660 610 38,5m498 457 407 Closure II This table summarizes span/pressure limitations for unreinforced duct.For UL 181A-P Pressure Sensitive Tapes larger duct sizes,see The Pocket Installer,AHS-3. Use tapes listed and labeled in accordance with Standard UL 181A Thermal Conductivity and marked"181A-P:"Tapes in compliance with this standard must Thickness Mean Temp.Cc?75°F(24°C) be imprinted with this information. in mm Btu•in/(heft'•°F) W/m•° Use tape that is a minimum 1"(25 nim)wider than the thickness of 1 25 0.23 0.033 the board.Apply to all longitudinal and circumferential joints and 11/2 38 0.23 0.033 rub in carefully using a squeegee or similar tool.The tape should be 2 51 0.23 0.033 Conductivity per ASTM C518. rubbed in until the scrim pattern from the duct board facing shows through the tape.Center tape over the edge of stapling flap.Heat Thermal Performance seal if temperature is below 40°F(4°C). Thickness R-value in mm (hr•ft4°F)/Btu m'•°C/W Closure IV 1 25 4.3 0.76 UL 181A-M Mastic Closure 1' 38 6.5 1.15 Use mastics listed and labeled in accordance with Standard UL 181A 2 51 8.7 1.53 and marked"181A-M:'Before applying,stir the mastic thoroughly. - Brush on a 4"(102 mm)wide coating over the stapled flap.Embed Mat-Faced Micro-Aire Sound Absorption Coefficients the open mesh glass tape in the mastic.Apply an additional coat of (Type"A"Mounting) mastic over the tape,filling in the mesh. Sound Absorption Coefficient at Frequency Thickness (Cycles per Second)of: Limitation of Liability Type in mm 125 250 500 1000 2000 4000 NRC If the closure system used is not one of the approved systems noted 475 1 25 0.07 0.25 0.63 0.90 0.97 1.00 0.70 above,and if application is not in accordance with the tape or glass 800 11 38 0.10 0.42 0.91 1.04 1.04 1.04 0.85 fabric and mastic manufacturer's stated procedures,the UL 181 Class 800 2 51 0.17 0.63 1.10 1.05 1.04 1.06 0.95 1 air duct rating and the Johns Manville product warranty are void. Coefficients were tested in accordance with ASTM C423 and ASTM E795. Recycled Content ISO 9000 Certification .. Johns Manville commercial and industrial insulation products are designed,manufactured and tested in our own facilities,which /� /' SCScerfifled. are certified and registered to stringent ISO 9000)ANSI/ASQC 90) AVERAGE I6%POST CONSUMER series quality standards.This certification,along with regular, RECYCLED CONTENT independent third-party auditing for compliance,is your assurance .1 that Johns Manville products deliver consistent high quality. The physical and chemical properties of Mat-Faced Micro-Aire® Fiber Glass Duct Board listed herein represent typical,average North American Sales Offices, values obtained in accordance with accepted test methods and Insulation Systems are subject to normal manufacturing variations.They are supplied Eastern Region as a technical service and are subject to change without notice. P.O.Box 158 Numerical flame spread and smoke developed ratings are not ,f,7Defiance,OH 43512 intended to reflect hazards presented by these or any other (800)334 2399 materials under actual fire conditions.Check with the Regional Fax (419)784-7866 Sales Office nearest you to ensure current information. Johns Manville All Johns Manville products are sold subject to Johns Manville's Western Region and Canada standard Terms and Conditions,including Limited Warranty and 717 17th St. P.O.Box 5108 Denver,CO 80202 Limitation of Remedy.For a copy of the Johns Manville standard Denver,CO 80217 Terms and Conditions,Limited Warranty and Limitation of Remedy 1-800-654-3103 (800)368-4431 and information on other Johns Manville thermal insulation and - JM.com Fax:(303)978-4661 systems,call(800)654-3103. HVAC-334 1/14(Replaces 9/10) ©2014 Johns Manville Y