Since the RedyTemp Instant Hot Water Recirculator has temperature
adjustment capability using the adjustment knob on the front of the
instant hot water recirculator at www.redytemp.com By setting the
temperature to the lowest setting which would keep the water in the
pipes at barely warm temperature on the hot water recirculator,
wouldn't this be enough to stop the pipes freezing up during the cold
seasons and save water from dripping down the drain all night.

I've heard of pipe heating tape which uses electric to heat the pipes
so they don't freeze... wouldn't the circulation of water throughout
the system be more energy efficient compared to the electrical energy
which the tape is consuming?