This Hayden system is a great option for replacing an existing or old unit. This will replace popular Vacuflo, Electrolux, Beam, Hayden power units. Ideal for cleaning homes up to 5,000 sq. ft. This is a single-motor 120 volt system. This model can be used with a HEPA type of bag or no bag. This unit can be vented outside. This is an all steel unit which includes a 5 year warranty.