Q."Can any of the Ariston/Bosch models be used on the hot side of the plumbing? My hot water heater takes a minute or two to reach several sinks, wasting time and water. I want to put a small tanked water heater in-line on the hot side." A. Yes, any of the Ariston/Bosch models can be used for that application.
Q."Do these heaters come with power cords?" A. The two smaller models (ES2.5 and ES4) come with 120VAC plug-in power cords. The larger GL8Ti model is hardwired directly into your wall.
Q."Do these water heaters have drain valves?" A. No. These units are small enough to disconnect and drain into a sink if desired.
Q."The Ariston/Bosch products specify the recovery rate - 'temp. rise' based on the GPH; what do you mean by this?" A. The recovery rate is the amount of water that the heating source can raise the temperature 90 degrees in 1-hour. A 1500 watt element can raise 6.8 gallons of water 90°F in 1-hour; if you turned on a GL8Ti, 7-gallon water heater with 45°F water in it, it would take just over an hour to heat the water to 135°F.