Product review (5 stars): Simplified Washing without Compromise
Weve used the pureWash for several months. It works as advertised. The unit produces ozone, which dissolves in the water and then acts as a cleaning agent. As long as water is flowing, the ozone-water mixture is entering the washer. So unlike conventional washing, where the detergent is used first, followed by a rinse  with pureWash its always a wash cycle, if that makes sense. We have a 2004 Duet washer. If we use the regular wash cycle, even on cold setting, there is some hot water used to maintain a minimum temperature. Presumably they figured out some water temps were too cold for washing. With ozone, colder is better because the cooler the water, the more ozone (i.e. cleaning agent) remains dissolved in the water. Think of it like a can of soda; warm soda will make a lot more bubbles than a cold can because the carbon dioxide dissolved in the soda is escaping much faster with the warm can. So to trick our Duet into using only cold water, we use a long rinse cycle (31 minutes) as a wash cycle. This uses no hot water and the clothes come out as clean, or cleaner than when using detergent.

Pros:
1) no detergent to add,
2) the wash cycles are shorter,
3) it is easier to mix loads with colors because were always on cold
4) we use less hot water

Cons:
1) The plastic supply house that came with the unit appears to be cheaply made. I had a leak at initial install and replaced it with a metal washer hose