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Real Suction Power: Understanding Airwatts, CFM, and Water Lift
The performance of vacuum cleaners are based on three critical values, namely, airwatts, CFM (Cubic Feet per Minute), and water lift. These values outperform disappointing amp ratings considered to be a measure of electrical consumption, and instead reflect true cleaning power.
Understanding Why Airwatts Are More Important Than Amps When Comparing Performance Of Canister Vacuums
Amp ratings indicate how much electricity is consumed by the motor. This is not an indicator of cleaning efficiency. Airwatt ratings are much more useful because they take into account cleaning efficiency by combining the two relevant measurements of airflow in CFM and suction strength (water lift). For example, an example of actual dirt removal will show that a canister vacuum with 300 airwatts is much more effective than a stick vacuum that uses 10 amps and has 150 airwatts. This is especially true when dealing with carpets and upholstery where dirt hides. This has also been shown in third party tests. At 250 airwatts, a vacuum is able to remove 95% of sand that is trapped in carpet. For cleaning up difficult messes, airwatts are the best metric to use.
What CFM and Water Lift Tell Us About Vacuum Cleaning Ability
CFM is a measure of the amount of air that moves in a period of time. This is important when tackling loose, surface-level debris like cereal, dust, or pet hair on hard floors.
Water lift, measured in inches (or kPa), determines maximum suction pressure necessary for removing deeply embedded dirt and fibers from high-pile carpets.
Metric Role Ideal for
CFM Loose debris clearance Hard floors, big debris
Water lift Embedded dirt removal Carpets, pet hair, upholstery
Canister vacuums usually get over 100 inches of water lift water while stick ones that focus on portability get 60-80 inches. This is the main reason why canisters do much better deep cleaning, especially in homes with mixed floors and lots of pet hair.
Canister Vacuum vs. Stick Vacuum: How Each Type of Vacuum Cleans Your Home
Cleaning Type: Pulling out Deep Carpet Dirt
Cleaning using a pull out style of canister vacuum lets users clean without needing to upgrade to a different style of vacuum as many times as with a stick vacuum. With a stick vacuum, as the user clean for extended periods, the pull out style canister vacuum can keep cleaning, as it does not have to rely on a battery to keep suction power. Part of what lets a stick vacuum operate with so little battery power is using a smaller stick vacuum to finish small sections of the home. It is normal for a stick vacuum to have a smaller sized batter, meaning the stick vacuum's cleaning ability can only and should only last for a few minutes. In order for the vacuum to stop cleaning for so many minutes, the user’s section of the home may have given the vacuum power enough to last so long. In the other case, vacuum canister cleaning still may not work as, while the vacuum may not have used all the power in the battery, the pull out of the canister still may not work as the battery may have used all the power in the vacuum parte of the battery enough to only be used for only a few minutes. Stick vacuum’s average power of suction can pull less dirt from the home compared to a pull style of a vacuuming carpet pull out stick style.
Thermal Throttling and Battery Decline are Limitations of Cordless Stick Vacuums
Regardless of how well engineered cordless stick vacuums might seem, they suffer from limitations that are inescapable. As an example, if used continuously, most lithium ion batteries will start losing power at around the 7-10 minute mark. Meaning that the vacuum suction will drop by over 30% after 7 minutes. In addition to this, to prevent overheating the machine power is throttled, meaning that on thick carpets or during prolonged cleaning, the vacuum will actually be performing worse. All of this leads to cleaning being extremely ineffective. This is particularly true on large areas which means that lots of cleaning will be left to do. All the interrupted jobs, and patches left to be cleaned take away from the cordless vacuum's perceived convenience. It also leaves users cleaning less because they have to stop vacuuming to recharge. You are left cleaning less and with the need to recharge before you can start vacuuming again.
The Meaning of Power: Filtration, Ease of Movement, and Applicability
Real performance power goes beyond the simplistic metrics of air watts and water lifting. Over time, the focus becomes the elements of vacuum design and functionality that are often the least marketed. Let’s begin with filtration. Genuine HEPA filters, and other top tier filters, trap virtually all of the airborne particulate matter floating in your home (99.97% of particulates that are smaller than 0.3 microns) and makes a world of difference for those with allergens or respiratory issues. There's also the issue of how a vacuum moves. Canister vacuums with flexible hoses are able to vacuum areas that other types just can't reach. In contrast to those, vacuums that have bulky or cumbersome designs tend to frustrate users and, ultimately, serve as a reason to stop cleaning. Lastly, ensuring the vacuum has the right combination of features for the job to be done is critical. For example, stick vacuums are excellent for cleaning up small, spilt messes, and for quick cleanups in the kitchen, but to perform a deep clean on carpeted areas, multi-level stairs, and for removing hair and dander from pet areas, a powerful canister vacuum with specialty cleaning tools is the best.
A cleaning report shows that almost half of all vacuum owners get rid of their vacuum within 2 years of ownership. The vacuum did not serve their needs. This suggests that comparing vacuum specifications alone is not enough to make a good purchasing decision.
FAQ
What is the relevance of airwatts in a vacuum’s function?
The measurement of airwatts indicates vacuum cleaning power. They measure dirt pickup ability on vacuum difficult surfaces cleaning like carpet and upholstery. Why is a high CFM Cleaning less than 1 micrometer in diameter?
The measurement of CFM (cubic feet per minute) indicates the air volume a vacuum can move. This is necessary for the vacuum to pick cleaning debris that is very loose and shallow on a hard surface floor.
What does vacuum water lift measure?
Water lift (measured in inches or Kilo Pascal) quantifies the suction pressure capable of pulling out dirt that is embedded deeply in carpet fibers.
Why would a corded canister vacuum be better for deep cleaning?
Only corded canister vacuums allow for uninterrupted suction to be used. This is because they plug into the outlet on the wall.
What disadvantages do cordless stick vacuum cleaners have?
The cordless stick vacuums experience power loss because of the battery and overheating. This leads to less suction and poor cleaning in areas and uneven cleaning for longer durations.
What role does filtration play in a vacuum cleaner?
HEPA filters keep at least 99.97% of particles that are 0.3 microns in size or larger. Better air quality is a big benefit, especially for allergy sufferers.