Royal Central Vacuum power units feature the Cyclonic Filtration Technology, a unique dual filtration process that utilizes cyclonic separation for primary filtration and a pleated disposable filter for secondary filtration. Unlike central vacuum systems that rely on permanent cloth filters, the powerful performance of the Royal CS power units will not decrease as dirt accumulates. The Royal CS820 power unit is for installations up to a manufacturers recommended maximum of 8,000 sqft in size. The CS820 model uses an Ametek 2 stage 15.7 Amp 120 volt tangential bypass motor that produces a maximum sealed vacuum (H2O lift) of 141 inches, with 124 CFM providing a total of 575 Max Air Watts. Recommended for installations up to 14 inlets/vacpans in size with the longest tubing run of up to 175ft. The CS820 is 13" in diameter X 38" high with a use weight of 32lbs installed.