What Determines the Suction Power of Vacuum Cleaner?

Suction Power of Vacuum Cleaner

Keeping the home hygiene is a very big mission to complete by burning many calories. But this task is done without a sweat drop by using a vacuum cleaner. It is a known fact.

A vacuum cleaner with high suction power will allow us to clean our homes more easily and effectively.

But What determines the suction power of a vacuum cleaner? The suction power is determined by the amount of power supplied to the motor in the vacuum. The more motor rotation, the more the suction power. 

So, the higher the power supply, the more suction power produced. 

While discussing this suction power topic more will help you understand how it can be measured, best suction power….etc.

Let’s start with the definition of suction power.

Suction Power

The main duty of a vacuum cleaner is to suck the dirt particles into a chamber fixed inside it. To suck the dirt particles, the motor in the vacuum cleaner requires certain power to create the maximum pressure difference between the inside and outside of a vacuum. The power required for the motor to suck the particles is called suction power. 

vacuum cleaner suction

The definition is perfect, but what about the measurements used for it.

How to measure the suction power of a vacuum cleaner?

There are many ways to measure the suction power of a vacuum cleaner. Some of them are listed below.


As the suction power is required to produce the pressure, the measurement can be done in Pascals. The unit of pascal defined 1 newton of force per square meter of area. The normal pressure is a measure for a good vacuum cleaner is about 20 kPa. Mean that suction power is about 2 tons of force per square meter.


Watts is the common measurement used for measuring the amount of power supplied to the vacuum cleaner. The Range of watts in a vacuum is about 40 – 2500 watts. But the suction power watts are different from the whole power watts of the vacuum.

For example, if the total power wattage is 1600 watts, the suction power consumes only 370 watts. The other components of the vacuum can consume the remaining wattages.


It is the most similar measurement we see on a vacuum cleaner. Similar to the wattage, the total consumption is different from the good suction power consumption. The Range of amps is about 4-12 amps. If you want to convert the amps into watts for a clear understanding, then you can use a formula of 


Note: In the US, Volts are about 120 V


The airflow has a close relationship with the suction power because suction power can be measured easily with the airflow, which defines how the airflow suction carries the dirt. This measurement is often called CFM, which means the air volume is being replaced in the vacuum in cubic feet per minute.

Overall, the more the CFM value, the more the suction power is. Generally, the vacuum with 100 CFM or more is considered as the vacuum with good suction power.

Sealed Suction:

This is a kind of test to perform to determine the amount of suction power. In this test, there is a tube filled with water in a sealed container.

By attaching the vacuum cleaner, you want to test to the sealed container of a tube filled with an eater. The test can begin. It is to observe that the level of water in the tube will increase if the vacuum cleaner has high suction power.

This is the best way to test the vacuum, which has good suction power. So, the level of water increases to 90 inches, referred to as powerful suction power in the vacuum cleaner.

Finally, this is all about determining the suction power, but it also depends on some factors that lead to poor suction power.

Other factors influence the Suction Power:

Here you can look at some factors that affect the good Suction power of a Vacuum Cleaner.

Firstly, the vacuum cleaner with no proper filter will reduce the suction power. So, regular cleaning by removing the residue dirt will increase the suction power.

The extensions’ designs will also affect the suction power, like a poor design of the hose, nozzle…Etc will affect most.

Size of dust depositor it has, a vacuum cleaner with a filled dust bag will reduce the suction power and lead to a sudden stop. So, based on the size of the dust depositor, check for regular intervals to avoid sudden stops.

The poor motor design will reduce the good suction power as it is the main element to produce a vacuum in the vacuum cleaner.

As the gap between the surface or carpet and vacuum increases, the suction power decreases. So, make sure the vacuum is near the surface you want to clean to get maximum suction.

In this way, the Suction power depends on the factors like the type of filters, type of extensions …etc. for the proper use.


Maybe it’s a tough decision to choose a vacuum cleaner with more suction power. But not this time. As of now, you are aware of the factors behind it, right! So, it can be an easy task by referring to the above details to get a good suction power vacuum cleaner. So, sort your needs while going to buy a new vacuum cleaner. Happy Shopping!!

Frequently Asked Questions:

Which is the best vacuum cleaner for the home? The upright vacuum cleaner is best for home use because it can effectively clean the carpet and bare floor.

How do I increase the suction on my vacuum? You can increase the suction power by unclogging the hose, cleaning the rollers, setting the right option, and cleaning/changing the bag or filter. 

Image Source: LG

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