Rheem Tankless Heater


Old 11-16-20, 03:04 PM
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Join Date: Jan 2008
Location: Nova Scotia, Canada
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Rheem Tankless Heater

Hi folks, I haven't been on this forum for almost 5 years, it's good to be back.
My question is about a Rheem 240V, 6 kW electric tankless heater, Model # 685366, suitable to supply hot water to a kitchen tap.
Is the input to these supposed to be cold water or can it be hot water from a hotwater tank or hot water furnace coil? where the heater is just used for a booster.
My son has one in his house that isn't working and I'm supposed to go to have a look on wednesday.
I'm not sure about his setup and I was just wondering


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