A friend of mine is tired of waiting for hot water and wants to install a
instant hot water system in his house, for a few hundred bucks.
At first I thought this is impossible without installing a separate pipe,
circulating the hot water to the heater in a loop. But, Google tells me that
these new systems use a recirculating pump and a thermostatic bypass valve
at the farthermost hot water outlet.
When the water at the hotwater faucet cools to 85 degrees, the pump
activates and the valve pushes the previously hot (but now cooler) water
into the cold water pipe.
This system claims enormous savings of water that would otherwise go down
drain (until the hot water arrives at the faucet). It seems to me that the
system saves water at the expense of constantly heating all the water in the
hot water pipes: A great waste of energy.
An instant hot water system makes sense in an apartment building or hotel,
but not in a home.
Furthermore, this system would constantly push 85 degree water into the cold
water line. Yuk!
Has anyone tried this system?
The Happy Iconoclast www.rationality.net
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