Product review (5 stars): Cold water with hot results
So far I love this unit. We were first unsure about it since we did not see any heating coils and have problems in our office to supply it with hot water. However, after the first run (with cold water), the dishes came out steaming hot. So I am not sure about everyone saying this unit is not heating. To me it seems it does indeed heat the water. For two years I cleaned the office dishes by hand and this is so much better. Clean dishes, no worries.
(in case the next run is resulting in cold dishes, I will update).

--- UPDATE --- (Aug 9, 2017)
This unit definitely heats the water, so I am not sure why people state here it does not. Our faucet water was cold and all dishes came out steaming hot, the waste water going back to the sink was hot as well. And, the unit also has a drying function and works pretty well. I opened the door and the cups were dry within a few minutes. I am totally satisfied and I am not sure why so many people say the unit has no heating function and no drying function. I guess they should read the manual (or had an older version).