Is There A Code Requirement For The Gauge of 6" Round Range Hood Duct?

[Molo]

Hello,
Is there a code requirement for the gauge of 6 inch round range hood duct? Is 30 Gauge allowed by code?
Are there reasons not to use 30 gauge?

Thanks in Advance

 

[wwhitney]

Yes, apparently 13 mils. I think 30 gauge is bigger than that. Not sure if thicker is better.

Chapter 16 Duct Systems: Duct Systems, 2020 Residential Code of New York State | UpCodes

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Cheers, Wayne

 

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[Breplum]

UMC requires 26 Gauge on range hoods. Do NOT use 30 ga.

 

[Fitter30]

M1505.1 General This is for texas
up.codes/viewer/texas/irc-2015/chapter/15/exhaust-systems#15

Domestic open-top broiler units shall have a metal exhaust hood, having a minimum thickness of 0.0157-inch (0.3950 mm) (No. 28 gage) with 1/4 inch (6.4 mm) clearance between the hood and the underside of combustible material or cabinets. A clearance of not less than 24 inches (610 mm) shall be maintained between the cooking surface and the combustible material or cabinet. The hood shall be not less than the width of the broiler unit, extend over the entire unit, discharge to the outdoors and be equipped with a backdraft damper or other means to control infiltration/exfiltration when not in operation. Broiler units incorporating an integral exhaust system, and listed and labeled for use without an exhaust hood, need not have an exhaust hood.

 

[Jeff H Young]

30 sounds thin my guess would be 26 but just a guess if I was doing my own personal Id go 26 or check local code

 

[wwhitney]

UMC requires 26 Gauge on range hoods. Do NOT use 30 ga.

I'm not finding the minimum thickness listed in the UMC, but I must be missing it. I would think it would be Chapter 5 or Chapter 6.

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Regardless, while California uses the UMC, New York has adopted the IMC, as well as the mechanical chapters of the IRC, so those apply to the OP.

Personally, I'd avoid 30 gauge even though it's allowed in New York state.

Cheers, Wayne