TNT Chem-Dry only uses the CTS Truck-Mount system! NOT all Chem-Dry franshises use this system. (Some use a tank and buffer system.) The CTS cleaning system has recieved the Carpet & Rug Institute's GOLD Seal of Approval. The CTS is respected by carpet manufacturers to help maintain your carpets' warranty. A CTS Truck-Mount system combined with the Chem-Dry Powerhead Hot Carbonating extraction provides a much deeper clean by removing the dirt, pet dander, pet urine, etc.. out of your carpet and directly into our waste tank located in our van.