BOAF Interpretations

Interpretation #8856

Original Request

Requested By: Michael Eash
Requester E-Mail: michael.eash@customairinc.com
Code Version: 2017
Code: RESIDENT
Code Description:
Chapter: Chapter 15 Exhaust Systems
Section: M1503.1
Topic: Range Hood Exhaust Duct
Question: Is it the intent of M1503.1, when stated to have a "smooth interior surface", that screws shall not be used for mechanically fastening ducts?

Answer:

Kitchen exhaust hoods in residential applications are not considered grease ducts. Therefore, screws are permitted to be used. Clothes dryers ducts are not allowed to have screws because of potential for lint buildup. The intent of the smooth interior surface is regarding the type of duct being used not the attachments or protrusions within it.

On 12/21/2023 at 1:37 PM

Commentary:

None.

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