UNI-STACK™-S
Single-Wall Stainless Steel Ductwork

UNI-STACK-S single-wall, stainless steel ductwork is designed to resist atmospheric corrosion in exhaust systems that vent fume hoods and heating appliances and for boiler breeching systems. It can be used with fuels such as liquid propane gas, natural gas, #2, #4*, #5*, and #6* fuel oils, wood*, and coal* (*316 stainless steel should be specified when using these fuels for combustion). It is suitable for caustic air and fumes, vapors, and particle-containment systems. UNI-STACK-S ductwork can handle flue gas with a maximum temperature of 1,400°F for continuous firing and a maximum temperature of 1,800°F for intermittent firing.

Construction

UNI-STACK-S single-wall duct is constructed with a welded longitudinal seam in standard lengths of 18, 30, and 42 inches. Standard diameters are 6 to 48 inches in 2-inch increments. For diameters of 6 to 36 inches, the standard material is 20-gauge, 304 stainless steel. For diameters of 38 to 48 inches, the standard material is 18-gauge, 304 stainless steel. Other diameters and materials are available. All components have flanged ends. Vee bands and sealant are provided to secure the flanged connections.

Clearance Requirements

Consult local codes to determine how much clearance is needed between UNI-STACK-S ductwork and combustible building materials such as wood and plasterboard.

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An enterprise of United McGill Corporation—Family owned and operated since 1951

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