How to Measure Vacuum Suction Guide

How to Measure Vacuum Suction
Articles on Vacuums

This article will guide you through how to measure vacuum suction. Everyone knows that vacuum cleaners are some of the most helpful cleaning tools in our homes today. Their simple yet effective design has eliminated the need for removing dust and other tiny particles manually from surfaces, making house cleaning much more efficient.

A vacuum cleaner collects dirt through suction power and then stores it for later disposal. There are various metrics to assess a vacuum cleaner’s performance and how well it sucks up debris and dust.

What Is Suction Power?

The air intake of a vacuum cleaner is called suction, and it’s an essential factor that determines the vacuum cleaner’s strength. The suction motor transforms electrical energy from a power source into mechanical energy as suction with airflow.

The vacuum motor’s suction is what provides a particular volume of air, its speed, or its velocity. The suction of most home vacuum cleaners is around 20 kPa. The stronger the suction pressure, the easier it is for the vacuum to pick up dirt.

How to Measure the Suction Power of a Vacuum

While there are many vacuum cleaners available today, it’s critical to select one with the appropriate suction power. When shopping for a perfect vacuum cleaner, it’s vital to learn how to measure vacuum suction power. You can determine a vacuum cleaner’s suction power in a variety of ways.

Air Watts

You can use the air watts technique to determine how many watts a machine requires to transport a unit of air through a vacuum cleaner nozzle. It’s the most accurate indicator of suction strength, and it works effectively for people who are familiar with vacuum cleaner cubic feet per minute and water lift.

Never use other vacuum measurements to measure watts, since the amount of watts is not the same as the number of air watts.

Airflow or Cubic Feet Per Minute (CFM)

This is a great technique to figure out how much airflow a vacuum cleaner has. You can measure the airflow from surfaces to bags or bins in a minute using CFM. This measurement will help you determine the power output from the motor and the exhaust resistance system. The exhaust system typically comprises fans, filters, and bags.

When a cleaner’s cubic feet per minute is high, it usually means it has a lot of suction power. Always detach the suction line and wands when using cubic feet per minute to get an accurate reading.

Water Lift

The water lift is also known as the seal suction. This method entails shutting the unit and attaching a water-filled tube. When the water level rises, so does the powerful suction. Water lift allows a vacuum cleaner to pick up or “lift” dirt from the floor surface, which is subsequently removed by airflow and deposited in the dust bag.

Sand and other heavy soils will be easier to pick up from carpet or flooring.

Amps and Watts

You can measure the power of an engine using amperage. It contains electrical energy in different sections of the device, making it rarely dependable. High amps usually imply high suction power.


As the suction power is needed to generate pressure, you can measure it in Pascals. Pascal is 1 newton of force per square meter of the area. Suction power is approximately 2 tons of force per square meter.

Read More: How Long Should A Vacuum Last?

Factors That Influence Suction Power

It’s normal for a vacuum cleaner to lose its suction power with time and usage. You might start to notice a decrease in vacuum performance if you use it more frequently or for more demanding tasks.


A vacuum cleaner with a small diameter tube or hose is more prone to clogging. Turn off the vacuum and disconnect the hose to check for any obstructions. Check the brush area of an upright vacuum for any possible blockages. It may harm the suction capability much more quickly if there’s blockage.

Worn-out Bags

Worn-out bags may ruin the suction of your vacuum cleaner. Every three months, you should replace your suction basket. When the bag is filled, the suction power diminishes. Make sure to check to see if the bag is full and clean it regularly. Also, look for any holes or rips in the bag. Always choose a high-quality and perfect vacuum cleaner bag. Cheaper bags won’t last as long.

Gaps in the Air Flow

If holes appear in the tube of your vacuum, it’s vital to replace it as soon as possible. Even a minor loss in airflow can have a significant impact. Make sure that there are no holes or gaps in the hosing. Make it a habit to inspect the hose for any gaps regularly.

Impact on Filters

Vacuum cleaners feature two filters for the best vacuum suction: a pre-motor filter and a post-motor filter. Check to see whether the pre-motor filter is clogged with dust. If this is the case, your vacuum’s suction quality will suffer significantly. Some filters include washable technology, which is definitely a benefit. To help maintain the safety of the suction system, wash the filters often.

Worn-out Motor

Always look for a more powerful motor. A faulty vacuum motor can affect a vacuum’s suction abilities. When the other characteristics are up to par, but the suction is still low, the vacuum motor is almost certainly to blame.

A high-quality vacuum motor is required for powerful and perfect vacuum pressure. So, if you’re thinking of replacing the vacuum motor, make sure it’ll work with your power unit.


If you’re planning on buying a vacuum cleaner, make sure you get the best vacuum cleaner that can effectively suck up dirt and dust. Some vacuums are suitable for modest jobs, some for heavy jobs, while others can handle simple everyday duties. It’s usually a good idea to check the vacuum suction power for yourself before making your decision

To do so, first determine for what purpose you require a vacuum cleaner, and then calculate and measure the vacuum suction. Watts, air watts, air flows, and filters may all be used to determine the optimum vacuum cleaning power.

Remember, choosing the perfect vacuum cleaner with the proper suction quality will decrease the vacuum cleaner’s maintenance and hazards.

How Does A Vacuum Work?

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