Specifications:

Deeper Cleaning: The Electrolux QuietClean Model PU3900B offers 640 air watts of cleaning power – the most cleaning power in a single-motor central vacuum – which means it will remove more dust and allergens from the living area and accommodate homes with up to 12,000 square feet of living space.

Built-in monitoring system: The LCD display allows the user to monitor the  overall performance, tells the user when to check the dirt receptacle, and the LCD on the PU3900B even provides accurate time and temperature information.

Convenient System: The Electrolux QuietClean Models PU3900B utilize a permanent self-cleaning filter, so you will never need to replace filters. The utility inlet on the front of these models allows a direct connection to clean the garage and vehicles while the window on the dirt receptacle allows you to check the dirt level.