"Ray" wrote in message
...
Recently I read somewhere that it's possible to add an auxiliary tank to
supply water heaters.

The purpose is, water comes from underground into a storage tank, where
the temperature of the water is raised by ordinary basement
temperatures -- especially in furnace rooms.

This water then feeds water into the heating tank at a considerably higher
temperature, thereby saving energy costs.

This is common sense. Is this technology available now?


Could have used this when living at 10,000 feet in Colorado mountains.
Incoming water temp in winter was 35 F and in summer 38 F. Frost line was 9
feet deep and people had lots of frozen sewer lines that were not deep
enough. WW