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2. Water heat recycling - Wikipedia

   en.wikipedia.org/wiki/Water_heat_recycling

   Installation of a double-walled copper-on-copper heat exchanger in a vertical section of the master drain line in a Canadian home (2007) Water heat recycling (also known as drain water heat recovery, waste water heat recovery, greywater heat recovery, [citation needed] or sometimes shower water heat recovery [citation needed]) is the use of a heat exchanger to recover energy and reuse heat ...

3. Water cooling - Wikipedia

   en.wikipedia.org/wiki/Water_cooling

   Water is inexpensive, non-toxic, and available over most of the earth's surface.Liquid cooling offers higher thermal conductivity than air cooling. Water has unusually high specific heat capacity among commonly available liquids at room temperature and atmospheric pressure allowing efficient heat transfer over distance with low rates of mass transfer.

4. Hoover Dam (Ohio) - Wikipedia

   en.wikipedia.org/wiki/Hoover_Dam_(Ohio)

   This reservoir is a major water source for the city of Columbus, Ohio. It holds 20.8 billion US gallons (79,000,000 m 3) of water and has a surface area of 3,272 acres (13.24 km 2), or about five square miles. Construction began during 1953 due to the increased water demand of post-war Columbus.

5. Unexpectedly Awesome Places to Retire Across America - AOL

   www.aol.com/unexpectedly-awesome-places-retire...

   In America's own "Hot Spring" for natural hot tub bathing, retirees get lots of benefits, including medical facilities, diverse restaurants, golf, camping, hiking and biking, and water sports ...

6. Hydrothermal circulation - Wikipedia

   en.wikipedia.org/wiki/Hydrothermal_circulation

   Hydrothermal circulation in the oceans is the passage of the water through mid-oceanic ridge systems.. The term includes both the circulation of the well-known, high-temperature vent waters near the ridge crests, and the much-lower-temperature, diffuse flow of water through sediments and buried basalts further from the ridge crests. [3]

7. Radiator (heating) - Wikipedia

   en.wikipedia.org/wiki/Radiator_(heating)

   Hot-water baseboard-style radiator (top) which is covered (left) and opened (right), with inside view (bottom) showing the aluminium fins which are attached in series to the copper pipe A hot-water radiator consists of a sealed hollow metal container filled with hot water from a boiler or other heating device by gravity feed, a pump, or natural ...