What Size Range Hood Do I Need

Download Commodity

Download Article

A range hood is a very useful tool for minimizing smoke, steam, and odors produced when cooking. The hood is mounted higher up your cooktop, and has a fan that pulls air through ductwork and outside your dwelling house; non-ducted versions recirculate the air through a charcoal filter. While range hoods are usually not required at all by local building codes, cooking without one tin lead to stagnating smoke and smells in your kitchen. The airflow capacity of a range hood is measured in CFM, or cubic feet per minute. For proper sizing, you will need to learn how to calculate CFM for range hoods.

Steps Download Article

one

Size your range hood based on the oestrus output of your range. The first guideline for sizing a range hood depends on the output of your range as measured in British thermal units (BTUs). The recommendation by the Abode Ventilating Institute (HVI) is to divide the BTU rating of your stove by 100 to arrive at a minimum guideline for CFM rating. Then, a range that is capable of producing 35,000 BTUs should be paired with a range hood with a rating of 350 CFM or greater. This minimum guideline should be examined alongside other guidelines based on stove and kitchen size.
2

Examine the relationship between your stove'southward size and the required range hood size. The HVI also provides recommendations for sizing a range hood based on the width of your range. If your stove sits against a wall, you should provide 100 CFM of airflow per linear foot of range.^[ane] For example, a 24-inch (60 cm) range would require a hood rated at 200 CFM or greater. If your stove is on an isle, y'all should provide 150 CFM of ventilation per foot of your stove's length. Then, a 24-inch (60 cm) range on an island needs 300 CFM of airflow.

Advertisement
3
Determine the recommended ventilation based on your kitchen's size. The HVI likewise recommends that your range hood should be capable of cycling the air in your kitchen completely 15 times per hour.^[2] This equates to a complete cycling of air every 4 minutes.
- Begin past measuring the flooring expanse of your kitchen. In a rectangular-shaped room, this can be done by multiplying the width and length. For example, a 10 ft x fifteen ft (3 chiliad 10 4.5 m) kitchen has a floor area of 150 foursquare feet (14 square meters).
- Summate the total volume of your kitchen. This is done by multiplying the floor surface area by the ceiling height. For example, if a kitchen has 150 foursquare feet (14 square meters) of floor surface area and a ceiling height of viii anxiety (2.4 thousand), the total volume is 1200 cubic feet (34 cubic meters).
- Split up the full book by 4 to get the required CFM rating. A kitchen with a volume of 1200 cubic feet (34 cubic meters) would need a range hood with a rating of (1200 / iv) or 300 CFM.
iv

Add more based on Ductwork. Once you've calculated your CFM based on the above points, you're as well going to want to add ix CFM for a 9' duct and 25 CFM for every elbow bend encountered.
v

Cull the greatest of these three guidelines to size your range hood. After arriving at CFM recommendations based on heat output, range size, and kitchen size, compare the numbers. To ensure the best performance, size your range hood based on the highest number of the 3. Don't forget to add the value from Step iv! You just demand to add it up to the highest of the other three.^[iii]

Advertisement

Add New Question

Question

How practice I convert cubic anxiety per minute to cubic meters per hour?

1 cubic meter/hour = 0.588 577 77 cubic feet/minute one cubic foot/minute = 1.699 010 82 cubic meter/60 minutes
Question

Is there a minimum edifice code standard for gas ranges?

Yeah, most places crave 100 CFM per 10,000 BTUs. Add all the BTUs in the range.
Question

In Step One, is the number given per hour or per minute?

Upnorth Here

Top Answerer

The discussion in Step One is related to "cubic anxiety per minute", or "CFM". Pace Iii talks near "air changes per hour", or "ACH".

Inquire a Question

200 characters left

Include your email address to get a message when this question is answered.

Submit

Range hoods are rarely required by building codes. The HVI produces only recommendations, non requirements.
Note that not-ducted range hoods do non provide true ventilation, only air filtering. When using a non-ducted hood, it is best to open a window in the kitchen when using the range.

Thanks for submitting a tip for review!

Calculations are based on rule of thumb. If the manufacturer of your cooking appliance does not specify a range hood size in, so your hood should be designed by a professional ventilation engineer. R. Amos iii-24-2016