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The time to hot water will be important for determining the water efficiency of the HWDS, especially for shower draws.
The energy efficiency of the HWDS for these draws at the kitchen sink and by the dishwasher was about 20%.
The anomalous average daily hot-water use at the water heater, with different amounts of water apparently flowing into and out of the water heater over a day, could have been caused by back flow from the HWDS into the cold-water system.
and water efficiency of the HWDS could be calculated for each draw.
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