SELKIRK Corporation has been a leading manufacturer of chimney, venting and air distribution products for the commercial and residential HVAC and hearth industries for more than 80 years. SELKIRK manufactures products in the United States, Canada and Mexico.

Architects and engineers have two options for specifying the design and construction of kitchen hood (Type 1) exhaust duct, more commonly known as grease duct, per mechanical code requirements: field fabricated and listed (3rd party safety certified) factory-built, modular duct. The field fabricated grease duct is typically rectangular and made of 16 gauge, welded carbon steel. The factory-built design is cylindrical and made of 20 gauge stainless steel.

SELKIRK Models G, PS, IPS and ZC grease ducts comply with all major mechanical codes including the International Mechanical Code (IMC), the Uniform Mechanical Code (UMC), the California Mechanical Code (CMC) and NFPA96 (Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations). Additional approvals have been gained in many urban areas and municipalities who have their own mechanical codes.

SELKIRK offers seven interchangeable options in commercial grease duct from an economical single wall to insulated zero clearance double wall. SELKIRK'S factory-built grease ducts have been specified and installed in simple one-story restaurants to multi-story high-rises including low head room kitchen applications.

SELKIRK was one of the first to develop factory-built grease duct and remains a leading provider of the factory-built design today. They use the same robust design that is used on their commercial boiler flue pipe (aka pressure stack) and generator / engine exhaust systems. Traditional models are as follows: G (single wall), PS (double wall air insulated), and IPS-C1, C2, or C4 (double wall, blanket insulated (1”, 2” or 4” options).

UL1978 Listed grease ducts have been acknowledged as acceptable alternatives to field fabricated grease ducts since the mid 1990’s in the various codes.

Standard Product Line

Model PS / IPS Pressure Stack

SAF-T Vent CI Plus Commercial Double Wall Vent (AL29-4C® Stainless Steel)

Model G Single Wall Piping System

Model DF Dual Fuel Piping System

Model DFS Dual Fuel (Small) Piping System

Zero Clearance Kitchen Grease Duct

Type B Gas Vent



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