What term describes construction that does not permit the passage of any grease under normal cooking conditions?

What term describes construction that does not permit the passage of any grease under normal cooking conditions?

• A. Sealed
• B. Greasetight
• C. Greaseproof
• D. Oilproof

Answer: (B)

Grease control in kitchen exhaust systems hinges on preventing any grease from passing through the construction during normal cooking. The term that describes this level of resistance is grease-tight. This designation means the hood, duct, and joints are built so grease cannot permeate into the ventilation space, typically achieved with continuous metal ducting, tight joints, sealed penetrations, and proper closures. This reduces the risk of grease fires spreading through the system and makes cleaning easier because grease isn’t able to wick into hidden gaps. Other terms don’t fit the standard language used for these assemblies: sealed is generic and doesn’t specify grease resistance; greaseproof is usually used for materials like fabrics or papers that resist grease, not for ductwork construction; oilproof isn’t the terminology used in NFPA 96 for kitchen exhaust systems.

Grease control in kitchen exhaust systems hinges on preventing any grease from passing through the construction during normal cooking. The term that describes this level of resistance is grease-tight. This designation means the hood, duct, and joints are built so grease cannot permeate into the ventilation space, typically achieved with continuous metal ducting, tight joints, sealed penetrations, and proper closures. This reduces the risk of grease fires spreading through the system and makes cleaning easier because grease isn’t able to wick into hidden gaps.

Other terms don’t fit the standard language used for these assemblies: sealed is generic and doesn’t specify grease resistance; greaseproof is usually used for materials like fabrics or papers that resist grease, not for ductwork construction; oilproof isn’t the terminology used in NFPA 96 for kitchen exhaust systems.