Fabric Duct Non-Insulated & Thermal Sleeves

Designed for efficient installation and engineered to precise standards, our flexible duct sets the standard
in quality and dependability.

Unique to others in the industry, we manufacture flexible ductwork without the use of glues or adhesives.
The mechanical-locked inner core maintains its shape at all 90° bends and offsets, thus eliminating the need
for extra reinforcement.  This manufacturingprocess produces a flexible duct with the highest performance
credentials of any flexible duct.

All of the Flexmaster  U.S.A.® flexible duct carry the ETL mark, which is tested to UL181 standards.

The Flexmaster U.S.A.® 20 year warranty is unsurpassed in the HVAC ductwork industry.

Non-Insulated Non-Insulated Non-Insulated Non-Insulated
Pressure Rated Pressure Rated Pressure Rated Pressure Rated
10" w.g. positive
5" w.g. neg thru 16" dia.
1" w.g. neg. 18" & 20" dia.
.
20" w.g. positive
10" w.g. neg thru 12" dia.
5" w.g. neg 14" & 16" dia.
1" w.g.
neg. 18" & 20" dia.
25" w.g. positive
10" w.g. neg thru 12" dia.
5" w.g. neg 14" & 16" dia.
1" w.g. neg. 18" & 20" dia.
10" w.g. positive
10" w.g. neg thru 12" dia.
5" w.g. neg 14" & 16" dia.
1" w.g. neg. 18" & 20" dia.
1NI 3NI 4NI  5NI

Connector Rated 

Polyethylene (PE) Fabric 

Connector Rated

Trilaminate of Aluminum Foil, Fiberglass and Aluminized Polyester 

Duct Rated 

PVC Coated Fiberglass Cloth 

Connector Rated 

Trilaminate of Aluminum Foil, Fiberglass and Aluminized Polyester 

Available in 25 ft Standard Lengths
Sizes to cover diameters from 4" thru 10", 12", 14", 15", 16", 18", 20", 24"
Thick Fiberglass Blanket - R-4.2, R-6.0, R-8.0

Type TSB
Fire-Retardant
Polyethylene Outer
Perm. rating = .10 grains
per square foot, per hour,
per inch of mercury

Type TSM
Reinforced, Metalized
Outer Jacket
Perm. rating = .05 grains
per square foot, per hour,
per inch of mercury