Heatwave Technology: constant heat helps maintain water temperative throughout the cleaning process. * 6-Cleaning Rows: loosen and remove deep dirt from carpets * Large Capacity Tanks: power through a cleaning faster with fewer trips to the sink to fill and empty the tank. * EdgeSweep Brushes: help clean against baseboards and around furniture. * Stair Tool and On-board storage: do away with dirt and stains on stairs and store tools easily with the convenient on-board tool storage.