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  2. Expansion tank - Wikipedia

    en.wikipedia.org/wiki/Expansion_tank

    Expansion tank in a central heating system. An expansion tank or expansion vessel is a small tank used to protect closed water heating systems and domestic hot water systems from excessive pressure. The tank is partially filled with air, whose compressibility cushions shock caused by water hammer [citation needed] and absorbs excess water ...

  3. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    A condensing boiler Hot water central heating unit, using wood as fuel. A central heating system provides warmth to a number of spaces within a building from one main source of heat. A central heating system has a furnace that converts fuel or electricity to heat through processes.

  4. File:PAO-Diagram-09216ad 02.pdf - Wikipedia

    en.wikipedia.org/.../File:PAO-Diagram-09216ad_02.pdf

    This image or file is a work of a Federal Aviation Administration employee, taken or made as part of that person's official duties. As a work of the U.S. federal government , the image is in the public domain in the United States.

  5. File:Active Indirect Water Heater Diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:Active_Indirect_Water...

    English: Active indirect water heater. 1: Municipal water feed 2: Fluid from water storage tank to external (passive) heat source; passive heat source can be the ground (soil or groundwater), sun or air; eg via heat pump, or thermodynamic solar panel 3: Fluid from heat pump, or thermodynamic solar panel to water storage tank 4: Pump, actuator, controller and other parts 5: Water heater 6 ...

  6. Furnace (central heating) - Wikipedia

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

    Air convection heating systems have been in use for over a century. Older systems rely on a passive air circulation system where the greater density of cooler air causes it to sink into the furnace area below, through air return registers in the floor, and the lesser density of warmed air causes it to rise in the ductwork; the two forces acting ...

  7. OpenTherm - Wikipedia

    en.wikipedia.org/wiki/OpenTherm

    OpenTherm (OT) is a standard communications protocol used in central heating systems for the communication between central heating appliances and a thermostatic controllers. [1] As a standard, OpenTherm is independent of any single manufacturer. A controller from one manufacturer can in principle be used to control a boiler from another ...

  8. Boiler - Wikipedia

    en.wikipedia.org/wiki/Boiler

    Trycock: a type of valve that is often used to manually check a liquid level in a tank. Most commonly found on a water boiler. Flash tank: High-pressure blowdown enters this vessel where the steam can 'flash' safely and be used in a low-pressure system or be vented to atmosphere while the ambient pressure blowdown flows to drain.

  9. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    The inside of a hydraulically operated two-stage tankless heater, heated by single phase electric power. The copper tank contains heating elements with 7.2 kW maximum power. Tankless water heaters—also called instantaneous, continuous flow, inline, flash, on-demand, or instant-on water heaters—are gaining in popularity.

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