This data measures the quantity of air that is moved at the same time, in cubic feet per minute (CFM) or in cubic meter per hour (CMH). A high airflow creates an important air movement, thus considerably increasing the capacity to vacuum dust and dirt within a larger range. This data is more important if you intend to use an electric powerhead: since it’s the electricity that will make the roller turn, the air movement created is of greater interest.
Having understood the respective functions of these two technical terms, it is important to know that these two characteristics ensure a maximal power altogether. It is therefore essential to analyse both of these data as a whole, and not independently.
Airwatt is a measurement that represents the motor performance, taking both these technical data into account. It is in fact calculated with a ratio between the airflow (CFM/CMH) and the water lift (H2O). It is therefore a major technical data that must be considered, although it is very sensitive to other factors, and so it would be inconvenient to only consider the Airwatt.
Often shortened as “Amps”. It’s the amount of electrical current used during motor operation.
Vacuum motor part. See Anatomy image at the bottom of this page.