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Owning a Los Angeles restaurant, knowing the types of cuisines that you cook in your commercial kitchen, your years of experience in runing a going concern, all this will also give you an idea of the type of grease that vaporizes into the air. Without an exhaust system, the vaporized grease settles somewhere within the kitchen, causing immense damage and harm.

Almost every Los Angeles commercial kitchen has an exhaust system with a built-in grease duct, which is designed to vent grease-laden inflammable vapor outside the commercial cooking space. The grease duct is an essential part of the exhaust system that clears the air inside the kitchen and keeps the room ventilated.

What is the purpose of


When grease is heated beyond its vaporization point, it creates vapors that go through the exhaust duct. When the vapor cools, it condenses and settles in cooler places within the duct. Grease ducts carry grease-laden vapors away from the kitchen. These vapors are drawn by an exhaust fan, which cools the vapor and allows grease to form on the surface of the ducts.

Grease duct cleaning becomes necessary to avoid accidents that can cause fire, as grease is highly inflammable. Our experts at Bryan Exhaust Service ensure that the grease duct is cleaned thoroughly without any residue remaining within the duct.

Technician carefully crawling through and cleaning a restaurant kitchen exhaust duct

How Are Grease Ducts


Grease ducts are regulated in terms of their maintenance and construction as they form the part of a building’s passive protection system. Their cleaning is dictated by fire code or safety regulations. Grease duct cleaning evidence must be filed by the owner to be presented during any fire inspection.

Grease ducts in restaurant kitchens generally fall under the requirements of NFPA 96. In Los Angeles, the requirement for commercial grease ducts is the California Mechanical Code.

Both of these codes layout the maintenance and construction of commercial grease ducts.

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What Are The


The requirements for cleaning are described as follows: “Hoods, grease removal devices, fans, ducts, and other appurtenances shall be cleaned to remove combustible contaminants prior to surfaces becoming heavily contaminated with grease or oily sludge.” CMC 514.4.1

Bryan Exhaust Service is in compliance with the requirements of NFPA 96. Call us and set up an appointment with one of our experts for all your exhaust cleaning service needs!

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Removing a chunk of grease from a commercial kitchen exhaust system in Los Angeles

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