The abundance of different data to evaluate a central vacuum's performance may drive you crazy, but how do you actually figure it out you may ask? Well, a specific datum that indicates the global performance of a central vacuum answers to that: the air watts.

What is an air watt?
The air watt's value relates between the airflow, the suction and power consumption. According to ASTM's international standards, this datum is calculated as followed: P = 1/8.5 x F x S where P translates to the power in air watts; F is the airflow in CFM; and S for the water lift. The air watts indicate the motor's global performance, and thus the central vacuum's efficiency level. It becomes subsequently very useful when comparing two central vacuums.
More Data to Consider

Although it is good to know the air watt value of a unit, relying on this datum alone is not enough. A central vacuum must also be evaluated by more precise criteria such as the waterlift and airflow; the tank capacity; the surface area to clean; the choice between an outdoor or indoor exhaust and much more.

Use the air watts to target the central vacuums that suits you, then use other available data values to narrow down the ideal unit you are looking for. Do not hesitate to consult our FAQ section for all questions and answers on different subjects.

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