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  2. Hot water reset - Wikipedia

    en.wikipedia.org/wiki/Hot_water_reset

    The typical range for conventional boilers is to vary the supply water temperature from 60 to 82 °C (140 to 180 °F) as the outside temperature varies from 18 to −18 °C (64 to 0 °F). Buildings cool down slowly when the outdoor temperature is moderate, and cool more rapidly when the outdoor temperature is colder. Hot water reset reduces the ...

  3. Condensing boiler - Wikipedia

    en.wikipedia.org/wiki/Condensing_boiler

    Natural Resources Canada [6] also suggests ways to make better use of these boilers, such as combining space and water heating systems. Some boilers (e.g. Potterton) can be switched between two flow temperatures such as 63 °C (145 °F) and 84 °C (183 °F), only the former being "fully condensing."

  4. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    Water typically enters residences in the US at about 10 °C (50 °F), depending on latitude and season. Hot water temperatures of 50 °C (122 °F) are usual for dish-washing, laundry and showering, which requires that the heater raise the water temperature about 40 °C (72 °F) if the hot water is mixed with cold water at the point of use.

  5. Aquastat - Wikipedia

    en.wikipedia.org/wiki/Aquastat

    The boiler will also fire (regardless of thermostat state) when the boiler water temperature goes below a range around the low limit, ensuring that the boiler water temperature remains above a certain point. The low limit is intended for tankless domestic hot water; it ensures that boiler water is always warm enough to heat the domestic hot water.

  6. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    The heating and DHW demands usually differ, and since installers will select a boiler to meet the larger demand (which is usually DHW in most homes), it will be oversized for the smaller demand; an oversized boiler will operate less efficiently due to problems such as short cycling and having increased return water temperatures that reduce ...

  7. Boiler (water heating) - Wikipedia

    en.wikipedia.org/wiki/Boiler_(water_heating)

    The boiler heats water to a temperature controlled by a thermostat. The water then flows (either by natural circulation or by a pump) to radiators in the rooms which are to be heated. Water also flows through a coil in the hot water tank to heat a separate mass of water for bathing, etc.

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