Thermaflex Flex-Vent KP Durable Outer Vapor Barrier of Black Polyethylene

Description

• UL 181 listed Class 1 air duct.
• Complies with NFPA standards 90A & 90B.
• Manufactured with a durable outer vapor barrier of black polyethylene.
• Has a smooth, air tight inner core of polyester designed for low to medium pressure systems.

Construction and Materials

Strong polyester film laminated and encapsulating a heavy, corrosion resistant steel wire helix forms the inner core and supports a thick blanket of fiberglass insulation over a fiberglass scrim. The outer vapor barrier is a jacket of durable black polyethylene.

Performance Data

• Maximum Positive Pressure: 10” water column (4”-16” diameter)
• Maximum Negative Pressure: 1’ water column (4”-16” diameter)
• Maximum Negative Pressure: 1/2” water column (14”-16” diameter)
• Velocity (feet per second): 4,000
• Operating Temperature Range: Minimum -20ºF; Maximum +250ºF
• R Value: 4.2 using ASTM C-518 (1991) at installed wall thickness on flat insulation only
• Flame Spread: less than 25
• Smoke Developed: less than 50
• Vapor Transmission: Rating 0.1

List Price
Size	List Price per 25'	Your Price per 25'
4	$30.71	$13.82
5	$31.71	$13.82
6	$33.43	$15.04
7	$37.86	$17.04
8	$39.43	$17.74
10	$50.00	$22.50
12	$63.43	$28.54
14	$77.43	$34.84
16	$94.71	$42.62
18	$127.14	$57.21
20	$171.43	$77.14