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  2. File:Active Indirect Water Heater Diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:Active_Indirect_Water...

    Active Indirect Water Heater Diagram.svg. English: Active indirect water heater. 1: Municipal water feed. 2: Fluid from water storage tank to external (passive) heat source; passive heat source can be the ground (soil or groundwater), sun or air; eg via heat pump, or thermodynamic solar panel. 3: Fluid from heat pump, or thermodynamic solar ...

  3. OfferUp - Wikipedia

    en.wikipedia.org/wiki/OfferUp

    OfferUp is a mobile-driven local marketplace that competes with companies such as eBay, Craigslist, and Facebook Marketplace. [2] [3] In 2015, OfferUp was named one of the Hottest Startups by Forbes, citing the company's explosive growth between funding rounds throughout the year, and was speculated to take over Craigslist's share of the C2C ...

  4. 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.

  5. 8 Home Items Under $100 That Will Lower Your Utility Bills - AOL

    www.aol.com/8-home-items-under-100-153726465.html

    Hutter says another simple yet impactful purchase is a water heater blanket, which you can typically find for about $20. “Many homes lose heat through older water heater tanks,” she said.

  6. 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 ...

  7. Feedwater heater - Wikipedia

    en.wikipedia.org/wiki/Feedwater_heater

    A feedwater heater is a power plant component used to pre-heat water delivered to a steam generating boiler. [1] [2] [3] Preheating the feedwater reduces the irreversibilities involved in steam generation and therefore improves the thermodynamic efficiency of the system. [4] This reduces plant operating costs and also helps to avoid thermal ...

  8. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    Water storage tank. Hot water to domestic appliances. A small tank water heater. 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.

  9. Expansion tank - Wikipedia

    en.wikipedia.org/wiki/Expansion_tank

    An expansion tank or expansion vessel is a small tank used to protect closed water heating systems and domestic hot water systems from excessive pressure. The tank is partially filled with air, whose compressibility cushions shock caused by water hammer [citation needed] and absorbs excess water pressure caused by thermal expansion. [1]