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2. Tips for troubleshooting water heater issues - AOL

   www.aol.com/tips-troubleshooting-water-heater...

   If your pilot light is off, it means your water tank isn’t lit. With gas water heaters, no flame means no heat. To check your pilot light, turn the gas control knob on your heater to the setting ...

3. 11 Reasons Why Your Water Is Only Lukewarm - AOL

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

   The dip tube pushes cold water down into the bottom of your tank to be heated. When the dip tube malfunctions, the water doesn’t get pushed down into the heating mechanism. As a result, your ...

4. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   Water heating is a heat transfer process that uses an energy source to heat water above its initial temperature. Typical domestic uses of hot water include cooking, cleaning, bathing, and space heating. In industry, hot water and water heated to steam have many uses. Domestically, water is traditionally heated in vessels known as water heaters ...

5. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   Gas water heaters have an exhaust vent or one to two exhaust pipes on the top, and still require electric power for electronics, sensing and ignition. A three-phase, 21 kW, 400-volt tankless water heater in Europe, with new European color coding for three-phase power. There are also heaters that use several single-phase circuits instead.

6. Catalytic heater - Wikipedia

   en.wikipedia.org/wiki/Catalytic_heater

   A catalytic heater is a flameless heater which relies on catalyzed chemical reactions to break down molecules and produce calefaction (heat). [1] When the catalyst, fuel (e.g., natural gas), and oxygen combine together, they react at a low enough temperature that a flame is not produced. This process keeps repeating itself until either oxygen ...

7. Storage water heater - Wikipedia

   en.wikipedia.org/wiki/Storage_water_heater

   Storage water heater. A storage water heater, or a hot water system (HWS), is a domestic water heating appliance that uses a hot water storage tank to maximize water heating capacity and provide instantaneous delivery of hot water. [1] Conventional storage water heaters use a variety of fuels, including natural gas, propane, fuel oil, and ...