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Air Watts and Vacuum Cleaners

Measuring the pure suction of a vacuum cleaner can be tough to determine if you are just starting your research for finding the right vacuum cleaner. Many vacuum cleaners and central vacuums will provide data such as watts, horse power, CFM’s, and amps. While some of these specifications are important, they do not give you a true measure of the suction of the vacuum cleaner. If you are in the market for a new vacuum cleaner or central vacuum cleaner, you should pay close attention to air watts and water lift; these are two specifications that truly measure the suction of the vacuum cleaner.

An air watt is a unit of power that is similar to a watt which is used to measure the suction of the vacuum cleaners motor, so the higher the air watts the higher the suction of the motor. The formula for measuring air watts is [air flow (CFM) x suction (inches water lift)]/ 8.5. Air flow and suction have an inverse relationship, so in order to get the most effective cleaning performance you need to find the balance between lift and air flow. Most manufactures have saved you the trouble of calculating the formula and have included this in their specifications.

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