In this example, you’ll want a minimum of 567 CFM for this size of the kitchen. So, you’re left with 2,268 cubic feet ÷ 4 minutes = 567. Or, you can also simply divide the volume of your kitchen by 4 as every 4 minutes, your air needs to be exchanged (60/4 = 15 air exchanges). 34,020 cubic feet ÷ 60 minutes per hour = 567. To get the number of cubic feet moved per hour, multiply your kitchen’s cubic feet by the air exchanges per hour.įor example, 2,268 cubic feet x 15 air exchanges = 34,020 cubic feet per hour. Now, as an accepted rule for ventilation, a range hood needs to have the power to exchange your kitchen’s air 15 times per hour. To calculate your kitchen’s size in cubic feet, multiply the length by the width and height.įor example, your kitchen is 18’ long x 14’ wide x 9’ tall = 2,268 cubic feet.
Bbq cfm airflow how to#
Here’s how to calculate exactly how much CFM you need based on the size of your kitchen.įirst, determine the volume of your kitchen. In general, larger kitchens will need to move more smoke and unwanted air to keep the air clean and harsh cooking odors at bay. When shopping for a range hood, it’s important to understand how the volume of your kitchen affects your range hood CFM.
To learn more about range hood CFM for your outdoor hood, check out this complete guide. Calculate your outdoor grill’s minimum CFM needs the same way as your gas stove: determine the total BTUs and divide by 100. It may have side burners and other equipment that produce more fumes. Remember, your outdoor grill has higher BTUs than an indoor cooktop. Learn more about venting your gas stove in our article ‘ Do gas ranges require venting?‘ Outdoor Grills So, you’ll want a range hood that moves at least 500 CFM of air.īecause gas stoves generate more concentrated fumes, it is better to err on the side of caution and choose a higher CFM. To determine the CFM of a hood over a gas range, add up the BTU output of each burner and divide it by 100.įor example, if you have two burners that put out 10,000 BTUs each and two burners that put out 15,000 BTUs each, your total BTUs for your stovetop would be 50,000. Burners range from 400 BTUs to 18,000 BTUs, but most will fall somewhere in between. The amount of heat emitted from a gas cooktop is measured in British thermal units (BTUs).īTUs describe the amount of heat required to raise the temperature of a pound of water by one degree Fahrenheit. Gas ranges produce a lot more heat and fumes compared to an electric range so you’ll want more range hood CFM. Learn more about venting your electric stove in this article. For example, if your cooktop is 36”, this calls for at least a 360 CFM hood. Simply multiply the width of your stove by 10 to get the appropriate CFM for your range hood. Range hood CFM over an electric stove depends on the width of your range. Range hoods over electric and gas cooktops, along with outdoor grills, require different CFM ratings.
What is the minimum duct size for a range hood?.Do I need makeup air for my range hood?.How many CFM do I need for a 36” gas range?.How do you calculate CFM for a range hood?.It depends not only on your cooktop but on your cooking style as well. The best range hood is different for everyone. Keep in mind that there is no ideal range hood CFM, but instead, an appropriate CFM based on your cooking style and habits in the kitchen. To vent cooking exhaust from your kitchen efficiently, we recommend a range hood with at least 600 CFM. So, for a 42” electric stove you want a range hood with at least 420 CFM. For electric stoves, multiply the stove width by 10. For example, a 100,000 BTU stove needs at least a 1000 CFM range hood. To power your range hood, you need at least 100 CFM for every 10,000 BTUs of your stovetop. Simply put, the higher the CFM, the more air the hood vents out of your kitchen.
Bbq cfm airflow full#
CFM is how many cubic feet of air the range hood exhausts every minute at full speed. The ventilation power of your range hood is measured in cubic feet per minute (CFM).
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Let’s talk about how many CFM you need to keep your kitchen clean and free of lingering smells. This is one of the most common questions we are asked here at Proline.
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