The vacuum motor is the heart of any central vacuum system. You may not see it, but it is doing all the work. There are many differences between the motors and it is hard to know what to compare. Today we will focus on comparing motor performance.
A central vacuum’s ability to clean your home depends on the motors performance. The industry uses Airwatts to help consumers compare central vacuums. Airwatts is measurement of air power and is based on airflow and suction. Many times you will see the airwatts based on peak or maximized airwatts which is calculated by using the maximum voltage. If you truly want to compare motors, we recommend looking at the motor specs at a 5/8″ orifice. This opening best illustrates the performance that you will have when cleaning. Basically, the 5/8″ orifice is the size of the opening on a cleaning tool.
For those of you that want to get technical…
Air Watts = airflow (CFM) * suction (inches of water) / 8.5
Air Power, AP, W, n – 1 . in a vacuum cleaner, the net time rate of work performed by an air stream while expending energy to produce an airflow by a vacuum cleaner under specified air resistance conditions. 2. A measure of the ability of the air stream to do work. Air Power is expressed in terms of Air Watts