Flexible Duct - Insulated

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4M

Type 4M High Pressure Flexible Duct Insulated

CONSTRUCTION FEATURES

Flexmaster’s Type 4M is manufactured to meet the highest quality standards in strength, permeability and fire resistance required in a flexible air duct. This insulated ETL Class 1 Air Duct is designed for application in a low to high pressure HVAC air distribution system.

LINER

A PVC Coated Fiberglass Cloth fabric. Mechanically Locked without adhesives.

HELIX

Corrosive resistant galvanized steel, formed and mechanically locked to fabric

VAPOR BARRIER

Fire retardant reinforced aluminum material. Excellent strength at low temperatures. Will not age harden.

INSULATION

Fiberglass insulation blanket, factory wrapped.

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