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2. 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 ...

3. 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]

4. Hot water storage tank - Wikipedia

   en.wikipedia.org/wiki/Hot_water_storage_tank

   A hot water storage tank (also called a hot water tank, thermal storage tank, hot water thermal storage unit, heat storage tank, hot water cylinder, and geyser) is a water tank used for storing hot water for space heating or domestic use. Water is a convenient heat storage medium because it has a high specific heat capacity. This means ...

5. 35 of the very best outdoorsy gifts for hikers, hunters and ...

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

   These small pocket-sized heaters are long-lasting and rechargeable, and can even recharge your phone on-the-go too, if necessary. They have three heat settings, up to 131-degree Fahrenheit. $28 at ...

6. 40 Secret Santa gift ideas for every type of person you know

   www.aol.com/lifestyle/secret-santa-gift-ideas...

   These small pocket-sized heaters are long-lasting and rechargeable, and can even recharge your phone on-the-go too, if necessary. They have three heat settings, up to 131-degree Fahrenheit. $20 at ...

7. 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.