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2. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   When DHW is used, a combination boiler stops pumping water to the heating circuit and diverts all the boiler's power to heating DHW. Some combis have small internal water storage vessels combining the energy of the stored water and the gas or oil burner to give faster DHW at the taps or to increase the DHW flow rate.

3. Automatic bleeding valve - Wikipedia

   en.wikipedia.org/wiki/Automatic_bleeding_valve

   Instead they are placed at some local high point, such as the highest point within a utility cupboard or boiler room, even though this is in a basement. European domestic gas boilers often include such a valve within the boiler casing itself. [1] An air release valve on an elevated section of a large diameter lavender-colored pipe

4. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   A common arrangement where hot-water space heating is employed is for a boiler also to heat potable water, providing a continuous supply of hot water without extra equipment. Appliances that can supply both space-heating and domestic hot water are called combination (or combi) boilers. Though on-demand heaters provide a continuous supply of ...

5. Boiler - Wikipedia

   en.wikipedia.org/wiki/Boiler

   A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, [1] [page needed] [2] [page needed] including water heating, central heating, boiler-based power generation, cooking, and sanitation.

6. List of boiler types by manufacturer - Wikipedia

   en.wikipedia.org/wiki/List_of_boiler_types_by...

   Vanderbilt boiler An American design, similar to the Lentz and large launch-type boilers. [36] Velox boiler: [61] vertical boiler: flued or fire-tube designs where the main shell is a cylinder on a vertical axis, rather than horizontal. Boilers of this external form may have a great variety of internal arrangements.

7. Condensing boiler - Wikipedia

   en.wikipedia.org/wiki/Condensing_boiler

   Condensing boilers are water heaters typically used for heating systems that are fueled by gas or oil. When operated in the correct circumstances, a heating system can achieve high efficiency (greater than 90% on the higher heating value) by condensing water vapour found in the exhaust gases in a heat exchanger to preheat the circulating water.