How Vacuum Motors Work

How does "Peak Horse Power" (PHP) relate to cleaning ability of a vacuum motor?

• The term PHP is not a good descriptor of the cleaning ability of a vacuum motor. The PHP of a vacuum motor is established with the bare motor (no fans) mounted on a dynamometer, loaded to a torque that far exceeds the greatest torque the motor fans (that suck up the dirt) could ever apply to the motor so it is totally unrealistic.

• At this high torque where PHP occurs, the motor generates so much internal heat it can burn out in seconds. At the high current required to calculate PHP calculations (over 80amps for some motors) the motor would trip circuit breakers or blow fuses in homes.

• Motor PHP testing artificially corrects motor winding performances to below zero temperature allowing higher published PHP values which is unrealistic.

• High PHP motors are often “surcharged” designed to run beyond reliable limits therefore, the durability of the motor would be substantially compromised.

What do AMPS and WATTS tell us about vacuum motors?

Amps and Watts indicate the amount of electrical power consumed by the vacuum motor. There is often no direct correlation between cleaning power produced by the vacuum motor and the amount of amps or watts being consumed from the power supply (input power).

What is SEALED VACUUM? Is it important?

Sealed vacuum alone does not indicate cleaning performance. Sealed vacuum is a test parameter that indicates how much vacuum is developed when the unit has a totally sealed blocked inlet. At a totally sealed vacuum no airflow can occur. With no airflow (no air moving through the tubing system), dirt won’t be picked up. Both vacuum and airflow must combine to enable dirt to be carried to the dirt bin ⁄ bag.

What is airflow? How important is it?

Airflow is measured by the number of “cubic feet of air” moved per minute (CFM) or cubic feet per hour (CMH). Airflow is produced by the motor with no restrictions to the motor’s fan inlet (wide open motor inlet) which is the highest that a motor can achieve, however with no sealed vacuum there is no ability to pick up dirt or debris.

What motor performance value is directly related to a vacuum’s cleaning ability?


Peak Air Watts is an important performance value for vacuum motor. Air Watts is the actual value of the vacuum motor’s output air. Air Watts represents the power produced by the vacuum motor for the purpose of cleaning. Amp or watt ratings only refer to the power consumed from the power supply. The formula for calculating Air Watts is: Air Flow x Sealed Vacuum ⁄ 101.84 = Air Watts. Air Watts is a good overall indicator of the general cleaning ability of a vacuum motor as it is the only measurement which includes sealed vacuum and air flow!

Which Vacuum System would be best for my needs?

We recommend that we get together on a NO OBLIGATION basis to clarify the size and type of dwelling you plan to build. After this discussion we will be in a better position to advise you on Brand, Model, Size of motor and Type, e.g. (Cyclonic or Disposable Bag System) which will best suit your needs.

 Customer Pledge:

1) To provide customers a prompt, courteous and professional vacuum repair service

2) To not only meet but exceed the expectations of our customers

3) To source vacuum cleaners only from manufacturers who produce quality products

4) To carry a comprehensive range of vacuum parts, tools, accessories and consumables

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 Contact Us:

Contact: Dean Benedetti


Phone: 0488 VAC UUM — 0488 822 886

Location: Cnr of Steel Street & Neumann Road,

Capalaba (Enter car park from Neumann Road)

Postal: P. O. Box 1635; Cleveland Qld 4163