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Old 05-16-2017, 03:02 PM   #34
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Originally Posted by Formula260SS View Post
Doesn't the heater need to turn on and off to keep the loop hot? Wouldn't that defeat the purpose of saving energy? We are still talking on demand systems right?
With a recirc pump on a traditional hot water tank/boiler/reserve (you can just repurpose an old circulator pump), and a check valve that taps in close to the end of your run, recirculates it back to the input side of your hot water source.

That way you save water (and some power) because now you can prewarm up your pipes at a push of a button, and cycle water from the heater to just before your shower/back room sink back to the water heater getting it up to temp BEFORE you turn the shower on and 'let it warm up' for 10 mins.
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