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  2. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    Built-in small storage water reservoir as part of heat exchanger (typically between 2 US gallons (7.6 L; 1.7 imp gal) to 20 gallons) Dual activation: flow sensing and thermostat control; Hybrid water heaters can be gas-fired (natural gas or propane), or be electrically powered using a combination of heat pump and conventional electric heating ...

  3. Storage water heater - Wikipedia

    en.wikipedia.org/wiki/Storage_water_heater

    Solar heat is clean and renewable. This is the most modern system. Increasingly, solar powered water heaters are being used. Their solar thermal collectors are installed outside dwellings, typically on the roof or walls or nearby, and the potable hot water storage tank is typically a pre-existing or new conventional water heater, or a water heater specifically designed for solar thermal.

  4. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    An 80 US gal (300 L; 67 imp gal) electric storage tank water heater was able to have a minimum energy factor of 86% under the pre-2015 standard, while under the 2015 standard, the minimum energy factor for an 80-gallon electric storage tank water heater is now 197%, which is only possible with heat pump technology. This rating measures ...

  5. This compact $45 space heater is a winter must-have - AOL

    www.aol.com/finance/50-space-heater-winter-must...

    The affordable Dreo Oscillating Ceramic Space Heater is perfect for bedrooms, home offices and even small bathrooms. This compact $45 space heater is a winter must-have — and it's on sale ...

  6. 35 of the very best outdoorsy gifts for hikers, hunters and ...

    www.aol.com/lifestyle/best-outdoorsy-gifts-for...

    This No. 1 bestseller comes with a 20-volt rechargeable lithium battery for cord-free convenience. "Excellent tool for small to medium tree and shrub trimming!" raved one reviewer .

  7. Edwin Ruud - Wikipedia

    en.wikipedia.org/wiki/Edwin_Ruud

    In 1889, Ruud engineered a design for an automatic storage tank-type gas water heater that used a bottom gas heater and temperature controlled gas-valve. [7] He later patented the design in 1890. [12] In October 1890, he expanded on his first water heater design, under the Fuel Gas and Manufacturing Company. [14]

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