Specification

ManualsBrandsThermaflex ManualsDucting & VentingMKE 4 in. x 25 ft. HVAC Ducting - R8.0

M-KE

Insulated Acoustical Flexible

Air Duct for All Pressure Systems

Construction and Materials:

CPE duct liner is permanently bonded to a

coated spring steel wire helix, also supporting

a blanket of fiberglass insulation. Vapor barrier

is an outer jacket of fiberglass reinforced

metallized film laminate.

Suggested Specification:

Flexible duct for connections between _________________________ and

_______________________ shall be Thermaflex M-KE air duct Listed by

Underwriters Laboratories, Inc., under UL Standard 181 as a Class 1 flexible

air duct and complying with NFPA Standards 90A and 90B. Duct shall be

factory made and composed of: a CPE liner duct permanently bonded to a

coated spring steel wire helix and supporting a fiberglass insulating blanket.

w permeability outer vapor barrier of fiberglass reinforced film laminate

shall complete the composite.

10 Year Warranty:

Thermaflex warrants that all insulated and non-insulated

products will be free from defects in materials and

factory workmanship for a period of ten years from

the date of manufactur

This warranty covers the

flexible duct,

materials and labor. This warranty applies

onl

y to ducts properly installed in accordance to

Thermaflex’s written installation instructions and under conditions specified

in published performance data. Thermaflex shall not be liable to buyer

or any third party for any special, secondary, incidental or consequential

damages however arising.

APPLICATIONS and ENGINEERING DATA:

Nominal Inside Diameter (inches): 4 5 6 7 8 9 10 12 14 16 18 20

Length (feet): 25 25 25 25 25 25 25 25 25 25 25 25

Inside Bend Radius (inches): 4 5 6 7 8 9 10 12 14 16 18 20

Operating Pressure (inches water column): Positive = 10 inches (4-12 in. ID) 6 inches (14-16 in. ID) 4 inches (18-20 in. ID)

Negative = 1 inch (4-12 in. ID) 1/2 inch (14-20 in. ID)

Operating Temperature Range (°F): Minimum = -20 Maximum = 250

Velocity (feet per minute): 5000

R-Value: 4.2, 6.0, 8.0

Surface Burning Characteristics: Max. Flame Spread = 25 Max. Smoke Developed = 50

Oxygen Index Ratings: CPE Core = 3.13 Metallized Jacket = 45.7

Vapor Transmission Rating (U.S. Perm): 0.05

Wir

Coating

Coated spring steel

wire helix

Special coating

prevents corrosion

Fiberglass

insulation

CPE liner

Fiberglass reinforced

metallized film vapor

barrier

Thermaflex is a registered trademark of Flex-Tek Group

Bulletin M-KE 7/05 Printed in U

.S.