How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
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Can I use a flexible duct for my range hood?
Saturday, January 2, 2021
A flexible duct is not approved by code or manufacturer’s installation manuals. The International Residential Code (IRC-M1503.1) states “the duct serving the hood shall have a smooth interior surface.” Both flexible and semi-rigid ducts have a corrugated interior. An example of how not to do it is shown above.
Here’s excerpts from two hood manufacturer’s installation manuals:
•• Do not use flexible or corrugated duct. This type of duct will restrict airflow and reduce performance.
** Only use smooth, galvanized, metal duct.
•• Never use plastic venting or plastic ducting.
And this is a diagram from a VentAHood installation manual.
Also, see our blog posts What are the code requirements for a range hood duct? 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:
• 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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