Water and HEPA FiltrationMotorized Power Nozzle10 year motor warranty3 year warranty on unitHigh and Low speedHealthy. Never purchase a bag or filter againboth acknowledged as germ/bacteria hotbeds. Natural. Bags are man-made and manufactured, but water? Water is n'tPurified. Bags and filters pollute indoor air. Sirena water-washes your air, returning it fresh. Reliable. Sirena cleans with 100 % performance, whereas bags and filters lose effectiveness with time. Easy. Bags and filters are untidy, foul-smelling, tough to find, and pricey. Water isn't really. The water-based filtration system makes Sirena a fundamentally remarkable complete home cleaning system. This permits it to clean your home in means your traditional vacuum merely just can't. Since of the ineffectiveness of bag/filter-based vacuums, this is. When dirt and dust go through a bag or a filter, it blocks the pores that permit air to stream with them. This blocked airflow means less cleaning ability, and the performance of such devices drops drastically over use. Without good airflow, the usefulness of your device decreases downward.