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Most residential range hoods have a CFM between 200 and 600. A higher CFM means your range hood is better at removing smoke and odors from your kitchen. The measurement ultimately depends on your stove’s width and heat output as well as the size of your kitchen. 

Compared to the average size of a stove and kitchen, 350 CFM would be the minimum recommended rating for the average kitchen. However, selecting a higher CFM range hood would guarantee better ventilation to match your cooking habits, whether they’re minimal or extensive.

You should contact a local range hood installation professional to install your range hood and do the ductwork. Prices range from $50 to $100 per hour, with the total number of hours required varying based on the project complexity. Simple installations might take an hour or two, while more complicated ones can take four hours or more.

A higher CFM will make the price of your range hood more expensive. It can be challenging to speculate how much the CFM rating affects price, but ductless range hoods—that don’t need as high of a CFM as ducted range hoods—are less expensive than their alternative. On average, ductless hoods cost between $100 and $300, while ducted hoods can cost as much as $1,000.

Smooth galvanized metal ducting is best and safest for venting a hood range. It’s best to avoid flexible and corrugated types of ducting, as these options don’t provide ample airflow and may not meet local code. For specific advice on which type of duct might be best for your kitchen, reach out to a range hood installation professional.