When we were looking at portable dishwashers, we went to the Davison's in downtown Atlanta and looked at the portable Westinghouse machines. The deluxe one with the back splash had two very stylish knobs. One was for the timer and one was for the temperature booster (on or off). The other model looked like this with one knob and no temp booster to guarantee 140F wash. Given that the cycle began with a warm up spray and went right into wash, if you didn't have the temp boost feature, you washed dishes in warm water. That would probably be the case with this jewel. Many of my parents' friends had DWs and said to be sure to get a machine with a pre-rinse so the WH was out. I felt sorry for the salesman who was trying to sell the machines.