How to calculate suction power of kitchen chimney?

(Last Updated On: December 31, 2022) Share on Facebook Share on Twitter When you think about buying the best kitchen chimney for your kitchen, it is very important to know about its suction power, which …

(Last Updated On: December 31, 2022)
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When you think about buying the best kitchen chimney for your kitchen, it is very important to know about its suction power, which is an important factor in a chimney.

If we put it simply, then the capacity of your kitchen chimney is known on the basis of its suction power. That’s how fast it sucks up that nasty smoke floating freely in your kitchen and throws it out.

Its suction power is calculated based on the amount of air and time taken, which is measured in cubic meters per hour (m3/hr).

So, now a question must be arising in your mind, that how can you find the right suction power for your kitchen chimney? Well, the main purpose of this article is to clear your dilemma, but before that you should consider some other factors as well.

The factors that affect the suction power of a kitchen chimney are:

Chimney Duct Bends

The most important factor affecting the suction power of a kitchen chimney is the duct bend, as the more the duct bends when the chimney is installed. So the airflow of the chimney has to face resistance, due to which, it has to use more power to carry the air to the desired destination.

Therefore, the number of duct bends directly affects the amount of suction power required.

Cooking Habits

As you all know, in Indian kitchen, a lot of spices are used for cooking, which increase the tendency of steaming. The same dilemma is faced by those people who cook food again and again.

In both cases, a kitchen chimney with high suction power is most effective.

Size of Chimney Ducts

The length and diameter of the ducts both play an important role in this factor. As you may have noticed, a small diameter causes a lot of resistance to build up.

The same issue comes with having longer ducts, in either case, the chimney will need more power to move the air. Therefore a kitchen chimney requires more suction power to ventilate the kitchen effectively.

Calculation of Suction Power of Chimney

If your kitchen is more spacious, you will need a chimney with more suction power. Because the rule of thumb is that for the effective working of the kitchen chimney, it has to expand the fresh air into the kitchen at least ten times within an hour.

Therefore, before buying a chimney, you should know about the volume of your kitchen.

By finding the product of the width, length and height of the space, you can calculate the volume of a room.

Since this product is the volume of your kitchen, multiplying this by ten, you can find the amount that the chimney will fill within an hour.

To understand this better, let us explain to you as an example, if the size of your kitchen is 5 x 5 x 3, then its volume will be 75 cubic meters.

Accordingly, an ideal chimney would supply 750 cubic meters of fresh air to your kitchen within an hour (75*10). Therefore, for a kitchen of this volume, a chimney with a capacity of 750m3/hr is an ideal product.


So you should choose the right suction power kitchen chimney for your kitchen to avoid using more energy or having a bad suction system.

If the larger the kitchen, the greater the suction power required by the chimney. However, some other variables such as your cooking habits, duct bend and size of ducts can also influence the chimney to work effectively.

Therefore, while installing the chimney, keep in mind that the minimum amount of bends on the ducts is used.

Also, if you use a chimney in a place like a restaurant, it generates more steam due to the repeated cooking. So you should consult the manufacturer, how much power chimney would be suitable for you.

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