Rectangular Duct

Lockseam or welded rectangular galvanized steel duct fabricated to SMACNA standards — the industry-standard choice for complex HVAC routing.

Base Material	Galvanized Steel G-90 (ASTM A-653)
Thickness	0.50 – 1.6 mm (SMACNA gauge schedule)
Size Range	100×100 mm – 2,400×1,200 mm
Standard Length	1.2 m
Seam Type	Pittsburgh seam / Snap-lock
Max Temperature	120°C continuous
Standard	SMACNA HVAC Duct Construction Standards / ASTM E84

Description
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Wind Flex Duct

Category: Air Duct

Overview

Wind Flex Duct is a multi-layer flexible duct assembly designed for the final connection segment between rigid ductwork and air outlets. The inner metalized polyester liner provides a smooth low-friction airflow surface while the intermediate fiberglass blanket layer delivers thermal insulation. The outer polyester jacket protects against moisture and mechanical damage.

Technical Specifications

Inner Liner	Metalized polyester film
Insulation	Fiberglass blanket
Outer Jacket	Polyester film
Helix Wire	Galvanized steel spring coil
Diameter	Ø 100 – 600 mm
Thermal R-Value	R-4.2
Temperature Range	-20°C to +120°C
Extended Length	6.0 / 7.6 m
Standard	UL 181 Class 1 / NFPA 90A