PHYSICAL DESCRIPTION FEATURES BENEFITS MHP-25 (25? length) flexible duct is constructed UL Listed Labeled with a spring steel wire helix, encapsulated in a Guaranteed out of package lengths 2-ply, air-tight inner core. Fiberglass insulation 10 Year limited warranty choices of R4.2, R6 R8 encompass the core and GREENGUARD Gold Certification a unique metalized, reinforced vapor barrier Formaldehyde free (see www.jplflex.com for more info) surrounds the entire duct. 3/8? oversize inner core Certified R-Values PRODUCT DATA Diameters: 4?,5?,6?,7?,8?,9?,10?,12?,14?,16?,18?,20?,22? CODE COMPLIANCE APPROVALS * 22? available in MHP25R6 only Listed Labeled Underwriters Laboratories, Length: 25 feet Inc. File # MH11637 UL-181 Class 1 Air Duct, Packaging: 1 section per poly-bag or carton. To meet Flame Spread 25 or Less / Smoke Developed thermal properties, packaging complies with 50 or Less. Meets the requirements of NFPA recommended 12:1 or less compression ratio. 90A 90B, UMC IMC and most model codes Vapor Barrier: 2-Ply Reinforced Metalized Polyester California Insulation Manufacturer #TD-1092 End Treatments: Raw Ended Inner Core: Air Tight 2-Ply Black Pigmented Polyester PERFORMANCE DATA Thermal Value: R4.2, R6 R8 Classified by Underwriters Laboratories, Inc. and bears the ADC Thermal Certification Mark. Maximum Positive Pressure: 6? W.G. (4? ? 12?) 4? W.G. (14? ? 22?) determined per ADC Test FD-72R1 at 180 F temperatures in a 90 elbow. Maximum Negative Pressure: 1? W.G. (4? ? 10?) oe? W.G. (12? ? 22?) Vapor Barrier: Flexible air ducts are for indoor applications and should not be exposed to direct ultraviolet light. Maximum Velocity: 5,000 FPM Operating Temperatures: 0 - 200 F Permeance: (Vapor ? Barrier) 0.01 US Perms per