Fabric Duct Insulated

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 manufacturing process 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.

Acoustical High Pressure High Pressure
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.

Core

Polyethylene

Core

Trilaminate of Aluminum Foil, Fiberglass and Aluminized Polyester

Core

PVC Coated Fiberglass Cloth

TYPE 1B    TYPE 1M

   

TYPE 3B    TYPE 3M

    

TYPE 4B     TYPE 4M

    

Low Pressure Acoustical Economy Duct
Pressure Rated Pressure Rated Pressure Rated
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.
6" w.g. positive
5" w.g. neg thru 16" dia.
1" w.g. neg. 18" & 20" dia. 
6" w.g. positive
1/2" w.g. negative

Core

Trilaminate of Aluminum Foil, Fiberglass and Aluminized Polyester

Core

SPUNBOND Nylon Fabric

Core

Double Lamination of
Tough Polyester

TYPE 5B      TYPE 5M

   

TYPE 6B      TYPE 6M

     

TYPE 9M