Thermaflex Flex-Vent KM Strong, Reinforced Metallized Vapor Barrier

Description

• UL 181 listed Class 1 air duct.
• Complies with NFPA standards 90A & 90B.
• Manufactured with a strong, reinforced metallized vapor barrier.
• 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. The outer vapor barrier is a strong jacket of fiberglass reinforced metallized film laminate.

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	$36.43	$16.39
5	$42.15	$18.97
6	$50.71	$22.82
7	$51.43	$23.14
8	$59.29	$26.68
10	$77.86	$35.04
12	$93.57	$42.11
14	$125.71	$56.57
16	$145.00	$65.25
18	$164.28	$73.93