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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. New Incentives Mean Orlando Residents Can Buy a High ... - AOL

    www.aol.com/news/2013-02-07-new-incentives-mean...

    New Incentives Mean Orlando Residents Can Buy a High-Efficiency Water Heater for Next to Nothing $650 rebate from Orlando Utilities Commission plus $300 federal tax credit apply to the purchase of ...

  4. Energy factor - Wikipedia

    en.wikipedia.org/wiki/Energy_factor

    The energy factor metric only applies to residential water heaters, which are currently defined by fuel, type, and input capacity. [5] Generally, the EF number represents the thermal efficiency of the water heater as a percentage, since it is an average of the ratio of the theoretical heat required to raise the temperature of water drawn to the amount of energy actually consumed by the water ...

  5. 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.

  6. Seasonal energy efficiency ratio - Wikipedia

    en.wikipedia.org/wiki/Seasonal_energy_efficiency...

    A residence near Chicago has an air conditioner with a cooling capacity of 4 tons and an SEER rating of 10. The unit is operated 120 days each year for 8 hours per day (960 hours per year), and the electric energy cost is $0.10 per kilowatt-hour. What is its annual cost of operation in terms of electric energy?

  7. Biden Energy Dept. deals another blow to natural gas supporters

    www.aol.com/news/biden-energy-dept-deals-another...

    (The Center Square) – It’s been a rough week for supporters of natural gas, with the Department of Energy issuing final rules that ban certain types of natural gas water heaters and DOE’s ...

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