Product Overview

Fab 4M FLEXIBLE FABRIC DUCTING
Fab 4M
This high pressure insulated flexible duct consists
of a core made from fiberglass cloth with flame
retardant coating which is mechanically locked
together without adhesives by a corrosive resistant
galvanized steel helix. The core is covered with
thick fiberglass insulation and covered by a flame
retardant, scrim foil mylar sleeve. This UL-181 Class
1 product combines a rugged puncture resistant
fabric with a highly dependable insulated vapor
barrier to create a superior high pressure thermal
duct ideal for commercial or institutional HVAC use.
Suggested Specification
Flexible duct shall be Fabriflex
™
Type 4M by Flexmaster. It will
be constructed of fiberglass cloth with flame retardant coating
which is mechanically bonded to a corrosive resistant outside
metal helix. The core will be factory wrapped with thick
fiberglass insulation and covered by a flame retardant, scrim
foil mylar sleeve. This duct shall be listed in accordance with
UL-181specification as a Class 1 air duct.
• Mechanically bonded
• Fiberglass insulation
• Vapour barrier
• UL Listed as a Class 1 Air Duct
• No adhesives
•
Core will not aid mold & mildew growth
• Exceptional strength
• Low permeability barrier
• Air tight and leakproof
• Corrosive resistant helix
• Thermal reliability
• Tear resistant core
• High pressure duct
rev08.15
Fabriflex
™
Email: [e-mail] Website: www.flexmaster.com
HVAC Products
FLEXMASTER
Z-Flex (US) Inc
20 Commerce Park North Bedford, NH 03110-6911
Tel:[phone] Fax: [phone]
800.654.5600
Core Material: Basic Fab 4
Thermal Resistance: Available R4.2, R6, R8
Maximum Rated Velocity: (5500 fpm)
Maximum Positive Pressure: 25” w.g. positive
Maximum Negative Pressure: 10” w.g. negative thru 12” diameter
5” w.g. negative, 14” & 16” diameter
1” w.g. negative, 18” & 20” diameter
Temperature Range: -20°F to +250°F
Bend Radius: 1 x diameter
Available Sizes: 3” to 24”
Standard Lengths: 25ft
UL Listing: UL-181 Class 1 Air Duct
NOTE: This UL Class 1 product has a flame spread rating of not over 25 without evidence of continued
progressive combustion and a smoke developed rating of not over 50.