Riccar R30D Tandem Upright uses tandem technology patented by Riccar. No other vacuum has two vacuum motors both creating suction and airflow. One motor is pulling the air through while the other motor is blowing the air into the vacuum. Many uprights have two motors but only one motor provides the suction while the other is designed to turn the revolving brush. In our opinion, the Riccar R30D Tandem Upright with tandem technology makes this the most powerful vacuum on the market. Vacuum carpets, hard floors and have a 17ft hose reach to do attachment cleaning. It is a sealed system with both HEPA media and charcoal filtration, great for allergy sufferers. Has both automatic carpet height adjustment as well as a manual adjustment to raise nozzle up high for high density soft pile carpets as well as frieze carpets.
To check out the vacuum and features please click this link: https://nybakke.com/riccar-vacuums/tandem-models/