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Tru,
You will not regret the benefits.
There are also timers you can get for the pump itself. So it isn't running while you are sleeping. No reason for it to be on, right?
They work great, if installed properly. Depending on the wait for hot water the energy they use is less than the wasted water. I forget who actually performed the survey but it has been looked at from an economics point as well.
Installing the loops is the most difficult part, and I would think for you, it wouldn't be that hard to do it yourself.
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