This is a second purchase. It is the one that does not heat the water. I used the first one a lot for cleaning cat messes and water leaks on carpet, and was pleased at how convenient it was. Then it broke or didn't perform as well or got too dirty, or I didn't have any carpet left in the house... I can't remember what happened. Then I spilled vegetable juice on the floor of my car and needed to clean/extract the liquid. Instead of going to a car wash, I purchased Bissell Little Green and cleaned it myself. I had mopped the liquid with a towel by then but I think it cleaned nicely. It's nice to have at hand.