Hot Water Heaters - Natural Gas, Propane
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- In detail
Water heating is a thermodynamic process that uses an energy source to heat water above its initial temperature. Typical domestic uses of hot water are for cooking, cleaning, bathing, and space heating. In industry, both hot water and water heated to steam have many uses.
In many countries the most common energy sources for heating water are fossil fuels: natural gas, liquefied petroleum gas, oil, or solid fuels. These fuels may be consumed directly or by the use of electricity (which may derive from any of the above fuels or from nuclear or renewable sources). Alternative energy such as solar energy, heat pumps, hot water heat recycling, and geothermal heating, may also be used as available, usually in combination with backup systems supplied by gas, oil or electricity.