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  2. Bang–bang control - Wikipedia

    en.wikipedia.org/wiki/Bang–bang_control

    A water heater that maintains desired temperature by turning the applied power on and off (as opposed to continuously varying electrical voltage or current) based on temperature feedback is an example application of bang–bang control. Although the applied power switches from one discrete state to another, the water temperature will remain ...

  3. Water heaters have a reset button and other ways to save on ...

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  4. Time switch - Wikipedia

    en.wikipedia.org/wiki/Time_switch

    The time switch can be programmed to turn on or off a connected device at specific times or according to a set schedule. For example, a user could program the time switch to turn on the lights at a certain time in the morning and turn them off at night, or to activate a heating system at a specific time before the user arrives home from work.

  5. Infinite switch - Wikipedia

    en.wikipedia.org/wiki/Infinite_switch

    The infinite switch itself was described in a 1975 patent of George F. Esker Jr. and Otto J. Cousins of the Harper Wyman Company. This switch would reset itself as the bi-metallic strip cooled, provided a cycle of calibrated opening and closing. It also provided an indicator light that remained on as long as the knob was not in the closed position.

  6. 11 Reasons Why Your Water Is Only Lukewarm - AOL

    www.aol.com/11-reasons-why-water-only-171300843.html

    This type of water heater could be 24% to 34% more energy-efficient than a traditional water heater, according to the Department of Energy. Tankless water heaters can also save space, as they don ...

  7. Thermostat - Wikipedia

    en.wikipedia.org/wiki/Thermostat

    Water and steam based central heating systems have traditionally had overall control by wall-mounted bi-metallic strip thermostats. These sense the air temperature using the differential expansion of two metals to actuate an on/off switch. [14]

  8. Instant hot water dispenser - Wikipedia

    en.wikipedia.org/wiki/Instant_hot_water_dispenser

    On the other hand, an instant hot water dispenser without a tank does not waste significant energy. When hot water is needed, the instant heater consumes at least 2000 watts to produce hot water at 92 °C and above. [citation needed] The hot water flow rate is approximately 20 litres per hour. Comparing this with the insulated tank type of hot ...

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