The grease duct system includes all components for a complete exhaust system from the hood to the exhaust fan inlet. Grease duct installations require provisions for cleaning the interior of the duct.

2020年10月2日 · The grease duct is required to slope to prevent the accumulation of grease in horizontal installations. Grease duct is either routed through a fire rated shaft enclosure or wrapped with an approved fire insulating blanket that allows for zero clearances, such as that manufactured by 3M.

Non-Welded Grease Duct/Chimney Systems Installation, Operation, and Maintenance Manual FOR YOUR SAFETY TWO MAJOR CAUSES OF GREASE DUCT RELATED FIRES: (1) FAILURE TO MAINTAIN REQUIRED CLEARANCE (AIR SPACE) TO COMBUSTIBLE MATERIALS AND (2) FAILURE TO CLEAN GREASE LADEN DUCTS. MAJOR CAUSES OF …

CaptiveAire's single wall & double wall grease duct are factory-welded for ease of installation and superior performance to traditional site-welded ductwork. Single wall grease duct is ETL Listed to UL Standard 1978 - Grease Ducts and CAN/ULC-S662.

UL-1978 Standard, Grease Duct – under this Listing, Models SWCK & DWCK have been determined suitable for Grease Ducts as defined by NFPA-96, the “Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations”.

Double wall grease ducts are listed for a continuous internal temperature of 500°F and intermittent temperatures of 2000°F. Double wall grease duct is ideally suited for use in commercial cooking installations for the removal of smoke and grease laden …

The grease duct layout should be carefully planned to allow adequate space for assembly, installation of supports, connection of support framing, access for cleanouts, accommodate standard fitting dimensions, rough openings for penetrations, etc.

Grease Duct Assembly The illustrations shown provide useful information on the installation of grease duct systems. Each installation is specific to the application and the job site. If you encounter a situation not covered by this illustration, refer to the guide or consult the factory.

Installation on Grease Duct per ASTM E2336 and CAN/ULC S144 (Figure 1) • System requires two layers of insulation applied directly to the duct with tight butt joints minimum 1.5” (38mm) compression at all seams on both layers.

Grease duct systems are offered in multiple materials for a variety of applications improving product versatility and function. For use with Type I and Type II ventilation hoods, cooking appliances, restaurant grease ducts and pizza ovens.