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  2. 11 Reasons Why Your Water Is Only Lukewarm - AOL

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

    This type of water heater could be 24% to 34% more energy-efficient than a traditional water heater, according to the Department of Energy. Tankless water heaters can also save space, as they don ...

  3. Tips for troubleshooting water heater issues - AOL

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

    Tank-style water heaters use natural gas or an electric coil to heat the water in the tank. Gas water heaters are generally less energy-efficient than electric water heaters, but the cost of ...

  4. Here's How Often You Should Drain Your Water Heater ... - AOL

    www.aol.com/heres-often-drain-water-heater...

    Step 3: Attach a water hose to the drain valve at the bottom of your water heater and run the hose outside or into a nearby drain. You can use any generic hose for this step, and a garden hose ...

  5. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    With a central water heater of any type, any cold water standing in the pipes between the heater and the point-of-use is dumped down the drain as hot water travels from the heater. This water wastage can be avoided if a recirculator pump is installed, but at the cost of the energy to run the pump, plus the energy to reheat the water ...

  6. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    A wetback stove , wetback heater (NZ), or back boiler (UK), is a simple household secondary water heater using incidental heat. It typically consists of a hot water pipe running behind a fireplace or stove (rather than hot water storage), and has no facility to limit the heating.

  7. Automatic bleeding valve - Wikipedia

    en.wikipedia.org/wiki/Automatic_bleeding_valve

    A working system should not generate further trapped gas. Air may be drawn in if there is a small leak, or dissolved air in make-up water may come out of solution, but this generally indicates a system leak if new water is needing to be added. The most likely cause of continual gas bleeding is hydrogen, rather than air. [2]

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