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

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

   Gas water heaters cost between $600 and $2,700 to replace, for an average cost of about $1,650. Electric water heaters cost between $600 and $3,500 to replace , for an average cost of about $2,100.

3. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   Where hot-water space heating boilers are installed, ... At $0.16/kWh the electricity would cost $1.68. Energy efficiencies of water heaters in residential use can ...

4. Solar water heating - Wikipedia

   en.wikipedia.org/wiki/Solar_water_heating

   Installation cost; Electricity used for pumping; Price of water heating fuel (e.g. gas or electricity) saved per kWh; Amount of water heating fuel used; Initial and/or recurring government subsidy; Maintenance cost (e.g. antifreeze or pump replacements) Savings in maintenance of conventional (electric/gas/oil) water heating system

5. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   The energy cost of heating is one of the main costs of operating a building in a cold climate. Some central heating plants can switch fuels for reasons of economy and convenience; for example, a home owner may install a wood-fired furnace with electrical backup for occasional unattended operation.

6. Tankless water heating - Wikipedia

   en.wikipedia.org/wiki/Tankless_water_heating

   A hybrid water heater is a water heating system that integrates technology traits from both the tank-type water heaters and the tankless water heaters. [5] It maintains water pressure and consistent supply of hot water across multiple hot water applications, and like its tankless cousins, it is efficient and can supply a continuous flow of hot ...

7. Underfloor heating - Wikipedia

   en.wikipedia.org/wiki/Underfloor_heating

   Natural gas or "methane" industry-wide is considered the cleanest and most efficient method of heating water, depending on availability. Costs about $7/million b.t.u. Propane mainly made from oil, less efficient than natural gas by volume, and generally much more expensive on a b.t.u. basis. Produces more carbon dioxide than "methane" on a b.t ...