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2. Here's How Often You Should Drain Your Water Heater ... - AOL

   www.aol.com/heres-often-drain-water-heater...

   “The most likely result to occur from a lack of maintenance is premature failure of your water heater, which can cost anywhere from $1,500-3,000 to replace depending on your home and geographic ...

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

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

   Electric water heaters cost between $600 and $3,500 to replace, for an average cost of about $2,100. However, many states are phasing out gas water heaters in favor of electric water heaters, so ...

4. Condensing boiler - Wikipedia

   en.wikipedia.org/wiki/Condensing_boiler

   Condensing boilers are water heaters typically used for heating systems that are fueled by gas or oil. When operated in the correct circumstances, a heating system can achieve high efficiency (greater than 90% on the higher heating value) by condensing water vapour found in the exhaust gases in a heat exchanger to preheat the circulating water.

5. Real estate contract - Wikipedia

   en.wikipedia.org/wiki/Real_estate_contract

   Money is the most common form of consideration, but other consideration of value, such as other property in exchange, or a promise to perform (i.e. a promise to pay) is also satisfactory. Notarization by a notary public is normally not required for a real estate contract, but many recording offices require that a seller's or conveyor's ...

6. Water heat recycling - Wikipedia

   en.wikipedia.org/wiki/Water_heat_recycling

   Typical retail price for a domestic drain water heat recovery unit ranges from around $400 to $1,000 Canadian. For a regular household, water heating is usually about 20% of overall energy demand. [ 2 ] The energy savings can result in an average payback time for the initial investment of 2–10 years.

7. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   In the United States, typical natural gas water heaters for households without unusual needs are 150–190 L (40–50 US gal) with a burner rated at 10.0–11.7 kilowatts (34,000–40,000 BTU/h). This is a popular arrangement where higher flow rates are required for limited periods.