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Energy Use Tip #4


Space Heating with Heat pump

Heat pumps transfer the heat stored in the ground or outside air into the home for heating or hot water. 


As the most cost effective method of heating using electricity with an average COP (Coefficient of Performance) of 2.5 or more (sometimes in excess of 4), meaning that to achieve 2.5 kilowatts of heating or cooling power, they use an average of less than one kilowatt of electricity


If compared to a conventional heating system such as an electric fire or gas boiler, these generally have a COP of less than one, so more than one kilowatt of power is used to generate one kilowatt of heat power.


Also, as heat pumps don’t directly use combustion to generate heat, there are no carbon emissions other than those created at source, during the electricity’s production, and only a small amount of electricity is needed to run the compressor. 


Heat pumps are best suited to properties with underfloor heating planned, or in place.

At this time the delivered energy cost in cent/kWh varies. *


As a further comparison to the costs under the previous heading

Electric Heat pump with SPF of 2.5

7.83 c/kWh on dayrate (based on 5,000-15,000 kWh usage per year)

3.58 c/kWh on nightrate (based on 5,000-15,000 kWh usage per year)

Electric Heat pump with SPF of 4

4.90 c/kWh on dayrate (based on 5,000-15,000 kWh usage per year)

2.23 c/kWh on nightrate  (based on 5,000-15,000 kWh usage per year)

Electric Heat pump with SPF of 6

3.26 c/kWh on dayrate (based on 5,000-15,000 kWh usage per year)

1.49 c/kWh on nightrate (based on 5,000-15,000 kWh usage per year)

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