Which wording best describes how listed hood assemblies must be installed?

• A. Terms of their listing and the manufacturer's instructions
• B. Local Codes
• C. NFPA 96
• D. UL Standards

Answer: (A)

Hood assemblies that are listed carry specific installation requirements defined by the listing and the manufacturer's instructions. The listing tells you exactly where, how, and under what conditions the unit has been tested to operate safely—including clearances, mounting, duct connections, electrical needs, and integration with any fire suppression system. The manufacturer’s installation instructions provide the step-by-step details to correctly install the unit so that its listed performance is preserved. Following both ensures the equipment remains compliant and able to perform as tested.

Local codes may add requirements, but they cannot override the conditions that are stated in the listing or in the manufacturer's instructions. NFPA 96 gives general principles for hoods and ductwork, but it does not replace the specific installation directions that come with the listed product. UL standards underpin the listing process, yet the actual installation comes from the listing terms and the manufacturer’s guidance.