Nutone PP650 PurePower 650 Air W Central Vacuum System Power Unit Delivers 650 air watts of power to ensure deeper cleaning than conventional upright vacuums; UL listed for your confidence Sealed hepa 2.0 featuring hepa filter with glued seams and a secondary exhaust filter that filters out the carbon dust emitted by the motor providing unmatched filtration for cleanest indoor air Ultra silent technology Flex collect debris disposal - hybrid bagging system offers bagged & bag less options in 1 unit Large 6 U.S. Gallon easy-clean, corrosion resistant debris pail that typically needs emptying only once every 6 months