Steam Heating
Steam heating is a means of distribution of heat in the occupied areas. Steam is generated in a boiler. Steam (steam), being lighter, goes to the top of the piping circuit. This pair is in 212F (100 C) or above, except for vacuum systems, which are rare). As it gives its heat to the occupied territory, the steam condenses. The condensed water, being heavier, returned in the boiler. Couples produces about 1000 Btu for each pound, which is condensed. Heat exchange devices in a room called radiators.
Two main systems. One-pipe system uses one pipe wear steam radiators. The same pipe is used to return of condensate. A two-pipe system uses one-pipe bear steam to the radiator and other pipes for the return of condensate.
For domestic use, these systems operate at low pressure, or in a partial vacuum. Units are tested at 50 psi (65 psi) or 450 kPa) for safety purposes. Commercial and industrial systems to use higher pressures that approach 1000 psi (7 MPa). Steam boiler requires a pressure relief valves, water level indicator, pressure sensor, temperature sensor.
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Air-Conditioning 
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