How many CFM do you need for your range hood? [step by step] 2021

While building or remodeling your kitchen, You should know How many CFM do you need for your range hood in the kitchen ?. A kitchen hood is one of the most essential components to consider.

You can count on it to maintain your indoor air quality by putting out the unpleasant odors and unhealthy smoke that is generated while making food.

How many CFM do you need for your range hood

Now, different kitchens have different sizes and types of hoods. Actually, there is a measurement that the manufacturers provide in terms of cubic feet per minute(CFM). It indicates that a more powerful hood will be more efficient at what it does, based on its CFM.

The amount of CFM for your range hood depends on a lot of things. First of all, you need to see the type and amount of cooking you do on a daily basis. Secondly, whether your range is electric or gas.

Even, small things like the size of your kitchen exhaust fan and the length of your ductwork will play a role in the amount of CFM that is required for your hood.

how many cfm do you need for kitchen range hood

We will not only cover what makes a good CFM for a hood but also explain why it is such an important thing to consider while buying your new hood. Here we are given details about How many CFM you need for your range hood in the kitchen?

Few Determines a Good CFM for a Range Hood?

Several factors come up while talking about the most effective CFM for your kitchen’s range hood. Let’s go through some of the actual facts that will help you(that’s why you are here for):

1.Range Hood Fan Size

Blower fans, also known as impeller fans resemble hamster wheels outperform fans with blades. Manufacturers say that, for a 12 inches stove width, you must have a hood fan installed that should be able to move 100 CFM of air. So, if you own a 30 inches wide stove in your kitchen, your range hood fan should rotate at least 250 CFM of air.

Larger hoods can create pain in your ears as they create noise for their big fans. While that’s an important thing to consider, range hoods with a low CFM may fail to vent all the cooking air and smell out of your kitchen on time, which creates an unpleasant environment.

2.Amount of Ventilation

The main thing to consider while installing a range hood is the size of your stove. The larger your stove is, the larger kitchen hood it is going to require. A good thing about range hood manufacturers is, they always provide you with recommendations on the amount of ventilation required. 

The whole point of CFM is based on the amount of air they can extract from a given area.

3.The complexity of Range Hood

Many people overlook this but make-up air must enter somehow as the hood draws out the unhealthy odors and smokes from your kitchen.

The smaller ones don’t usually come up with a make-up air system as our HVAC intake system does the job for you.

However, range hoods having more than 300 CFM have a dedicated make-up air system that can be expensive. Make a trade-off between the size you need and your budget while buying your hood.

How To Calculate CFM For Your Range Hood?

Now that we know a little bit about the terms and factors, it is time to get insights and go for an estimation. 

Commercial kitchens that do a lot of heavy cooking need a range hood with a CFM of at least 350. Not only must it be one but it must be.

The reason is, they go through a lot of cooking throughout the day that creates an excessive amount of unpleasant odor and smoke. This amount is required to clear that out.

For high-output cooktops, a minimum rate of 1 CFM per 100 BTU is recommended. Let’s say, a burner with an output of 35000 BTUs need a kitchen hood with 350 CFM to keep everything normal.

However, there are some disadvantages to buying a large range hood. Range hoods with a higher CFM usually make a loud noise. Purchasing a range hood with a relatively low CFM may save you from the sound, but you have to deal with the smoke and odor. So, there you go with trade-off again!

How Many CFM is Needed for a 36” Gas Range?

It is basic mathematics-the more heat your stove produces, the more CFM you need for your range hood. Take the total BTUs of your cooktop by adding the BTUs of each burner, then divide that by 100 to get the estimated CFM. So, in that case, you are going to need a 600 CFM range hood on a minimum.

Other than the heat, factors like the length of ductwork, number of elbows, etc. also have an impact on the amount of CFM, no matter how little.

For Installing you can see here how to install a range hood vent through ceilings.

Is 400 CFM a Decent?

The recommendation from us is purchasing a range hood that is more powerful than 400 CFM, but a casual cook may not face any problem and get it done within 400.

Generally, the quality of your hood increases with CFM, so 400 CFM may not come in a good shape, as manufacturers sell it cheaply in a big box at local stores.

According to the BTU/100 rule, if the score comes a little bit more than 400, there is no problem as it can cover that amount.

But, if the number goes high, you may want to consider buying a range hood with a higher CFM. The average stovetop burner generates about 7000 BTUs. Most of the ranges have between 4 and 6 burners. You know the math. Figure it out for yourself.

Range hoods are available in a wide variety of features that help improve our indoor air quality and way of living.

We know, choosing a range hood with a good CFM mostly depends on your budget rather than the factors and statistics. But, you must not overlook the actual facts like preferences, quality, and noise.

It is natural for larger range hoods to create noise because they have a large fan. Additionally, more airflow doesn’t always mean faster venting. Go for the one that best suits your kitchen and your budget as well.

So now you know How many CFM you need for your range hood in the kitchen

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