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2. Storage water heater - Wikipedia

   en.wikipedia.org/wiki/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 electricity. Less conventional water heating technologies, such as heat ...

3. How Much Does It Cost to Replace a Water Heater? - AOL

   www.aol.com/lifestyle/much-does-cost-replace...

   Most water heaters are either 40 gallons or 50 gallons, but can go as low as 10 gallons or as high as 120 gallons for commercial use. Price differences between capacity tiers range from $50 to $100.

4. Energy factor - Wikipedia

   en.wikipedia.org/wiki/Energy_factor

   The energy factor for residential water heaters is determined using the results from the 24-hour simulated use test. During the test 64.3±1.0 gallons of water are drawn from the water heater in six equally spaced draws that begin one hour apart. The hot water flow rate for each draw is 3.0±0.25 gallons per minute.

5. 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 ...

6. 18 Home Renovations Worth Paying Someone Else To Do - AOL

   www.aol.com/finance/18-home-renovations-worth...

   A new 40–to 50-gallon hot water heater costs $400 to $2,100 for the unit alone, with installation costs bringing the range to $600 to $3,100, according to HomeGuide.com.

7. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   Tankless water heating The inside of a hydraulically operated two-stage tankless heater, heated by single-phase electric power. The copper tank contains heating elements with 7.2 kW maximum power.