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  2. Condensing boiler - Wikipedia

    en.wikipedia.org/wiki/Condensing_boiler

    Since the final exhaust from a condensing boiler has a lower temperature than the exhaust from an atmospheric boiler 38 °C (100 °F) vs. 204 °C (400 °F) a mechanical fan is always required to expel it, with the additional benefit of allowing the use of low-temperature exhaust piping (typically PVC in domestic applications) without insulation ...

  3. Hot water reset - Wikipedia

    en.wikipedia.org/wiki/Hot_water_reset

    Condensing boilers can be made to operate at temperatures below the flue gas condensation limit, typically below 55 °C (131 °F) and raise stated efficiencies from 70-80% to around 90-95%. By acting as an operating control on a three-way powered mixing valve or proportional injection pump system that modulates the supply distribution hot water ...

  4. Furnace (central heating) - Wikipedia

    en.wikipedia.org/wiki/Furnace_(central_heating)

    The fourth category of furnace is the high-efficiency condensing gas furnace. High efficiency condensing gas furnaces typically achieve between 90% and 98% AFUE. [3] A condensing gas furnace includes a sealed combustion area, combustion draft inducer and a secondary heat exchanger. The primary gain in efficiency for a condensing gas furnace, as ...

  5. The Ideal Temperature for Your House in the Winter ... - AOL

    www.aol.com/ideal-temperature-house-winter...

    The Ideal Heat Temperature for Your House in the Winter. Both experts agree that 68°F is generally the most comfortable daytime temperature for homes in the winter. This thermostat setting will ...

  6. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    Gas-fired tankless condensing boiler with hot water storage tank (US) 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 ...

  7. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    A district heating system uses centrally located boilers or water heaters and circulates heat energy to individual customers by circulating hot water or steam. This has the advantage of a central highly efficient energy converter that can use the best available pollution controls, and that is professionally operated.

  8. Thermal power station - Wikipedia

    en.wikipedia.org/wiki/Thermal_power_station

    For a typical late 20th-century power station, superheated steam from the boiler is delivered through 14–16-inch-diameter (360–410 mm) piping at 2,400 psi (17 MPa; 160 atm) and 1,000 °F (540 °C) to the high-pressure turbine, where it falls in pressure to 600 psi (4.1 MPa; 41 atm) and to 600 °F (320 °C) in temperature through the stage.

  9. Condenser (heat transfer) - Wikipedia

    en.wikipedia.org/wiki/Condenser_(heat_transfer)

    The vapor typically enters the condenser at a temperature above that of the secondary fluid. As the vapor cools, it reaches the saturation temperature, condenses into liquid, and releases large quantities of latent heat. As this process occurs along the condenser, the quantity of vapor decreases and the quantity of liquid increases; at the ...