##### Asked by: Nel Teuber

asked in category: General Last Updated: 6th June, 2020# How many CFM do I need for my kitchen?

**The**Best

**CFM**for a Range Hood

**CFM**of ventilation per 100 BTU is recommended for high-output cooktops or gas ranges. For instance, a burner with an output of 35,000 BTUs requires a

**kitchen**range hood that provides 350

**CFM**to clear

**the**air effectively.

Also, how do I calculate CFM for kitchen exhaust fans?

To find the size of **fan** needed, multiply the cubic feet x the # of air exchanges (15) then divide by 60 (minutes in an hour). In our example that would be: 1,800 x 15 = 27,000 divided by 60 = 450. You need 450 **CFM** minimum for this size of **kitchen**.

Beside above, is 400 CFM range hood enough? The basic rule of thumb is that the burners on a gas **range**/cooktop produce a lot more heat than those on an electric **range** or cooktop. Then divide by 100 to find the minimum **CFM** needed for a **kitchen** with a gas **range** or cooktop. For example: 40,000 BTU gas **range** divided by 100 = **400 CFM range hood** fan or higher.

Likewise, how many CFM do I need?

The rule of thumb is that you **need** at least 1 **CFM** per square foot of room area. To determine the square footage of your bathroom, multiply the length times the width. For example, if your bathroom is 6 feet wide and 9 feet long, its square footage is 54. Therefore, it **should** have a fan rated for at least 54 ?**CFM**.

How do you size a kitchen exhaust fan?

To find the **fan** needed for your **size kitchen**, multiply the number of cubic feet in the room by the number of air exchanges (15), then divide by the number of minutes in an hour (60).