What are the code requirements for a range hood duct?

Saturday, January 2, 2021

The general requirements of the International Residential Code (IRC-M1503.1 and .2) for range hoods are:
•• Must discharge to the outdoors (not terminate in attic).
•• Have a smooth interior surface.
•• Be airtight.
•• Have a back-draft damper.
•• Constructed of galvanized steel, stainless steel, or copper.

    An exception is allowed for installation of a range hood that does not discharge outdoors if mechanical or natural ventilation is provided, and it is listed and labeled by manufacturer as ductless and installed per manufactuer’s instructions. There are also additional standards for exhaust rates and makeup air (IRC-M1503.3 and .4).

    Also, see our blog posts Can I use a flexible duct for my range hood? and Is a range hood exhaust fan required in the kitchen? and Does a combination microwave and range hood require a dedicated circuit? and What are the most common defects with over-the-range microwaves? and What is the maximum recommended height above the floor for an above-the-range microwave?

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Here’s links to a collection of some of our other blog posts about APPLIANCES: 

What are the building code requirements for installing an appliance (furnace, air handler, water heater) in the attic?

Which house appliances need a dedicated electrical circuit? 

Is a washing machine drain hose required to be secured at the standpipe?

When was GFCI-protection for kitchen dishwasher receptacle outlet first required? 

Why does venting a clothes dryer into a garage, attic, or crawl space cause problems?

Does a refrigerator water supply line require a shutoff valve behind it? 

My spa tub stopped working. What's wrong?

Why would a home have natural gas appliaces but no gas meter? 

Is a hot water faucet required at a washing machine?

Can I remove a 240-volt range receptacle and hard-wire the range? 

 Can a dishwasher be wired to a kitchen counter small appliance receptacle circuit?

Why is it bad to have a clothes dryer vent near an air conditioning condenser (outdoor unit)? 

Do home inspectors test the appliances?

Are a range and refrigerator required kitchen appliances for a house to pass FHA inspection? 

What are the code requirements for an outdoor dryer vent cover?

What is the maximum length for a clothes dryer vent? 

Why are my ceiling fan blades drooping?

How do you inspect a dryer vent? 

• Why is there a water hose connected to the back of the clothes dryer?

    Visit our APPLIANCES page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles. 

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