Cost to run | Guernsey Electricity

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Cost to run heating in Guernsey

How do heating costs compare? 

Heating a property has both cost and carbon implications. Use our calculator below for an idea of how your current usage of gas or oil would compare if you switched to electric heating both in terms of the price you'll pay and the volume of greenhouse gas emissions your property produces. 



  • Gas heating

    Your gas bill is presented in kWh, making it directly comparable to electricity. The efficiency of your gas boiler is also incorporated into the units confirmed on your gas bill. 

    Gas boilers are always less than 100% efficient and become more expensive to run over time as efficiency decreases. If your boiler is over 10 years old, it may be worth considering an upgrade. 

    Find the latest gas prices on Guernsey Energy's website

    Gas prices
  • Oil heating

    Your oil bill reflects the number of litres purchased before using the heating system - it doesn't consider the efficiency of your oil boiler or the conversion to kWh. We have included an option to compare costs depending on the age of your boiler as oil boilers cost more to run as they age. Plus, an in-built conversion to kWh will make it directly comparable to electricity. Please check your oil provider's website for the latest oil price. 

    Efficiency: -10 years: 90%, 10+ years: 80%. Conversion factor: 10.35 

    Oil prices
  • Electric heating

    Unlike oil and gas, electric boilers are practically 100% efficient and remain so throughout their lifetime. This is because the power needed to heat your home arrives ready-to-use and nothing needs to be burnt in your property to produce heat. 

    The prices used in this calculator can be found in the Superheat and Heat Pump section of our tariffs page.  

    Our carbon emission data can be found here



    Electric prices

Got your annual heating bill ready? Use our calculator as a guideline to see how much your heating may cost to run. 

  • Cost to run heating in Guernsey

    Use your current heating bill to compare costs

    Compare From

    Compare To

    Fuel kWh Annual cost Annual carbon emissions
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boiler efficiency explained

How does an inefficient boiler cost you money? 

Boiler efficiency

Standing Charge

The annual standing charge for electric heating has been included in this calculation. 

Oil Conversion

The Conversion Factor (CF) used to calculate the conversion to kWh is 10.35 

Oil Boiler Efficiency 

Under 10 years: 90%

10 years plus: 80% 

Carbon unit of measure (kgCO₂e)  

This is displayed as kilograms of carbon dioxide equivalent. CO₂e is a way to describe the overall contribution to global warming when taking into account the carbon dioxide (CO₂) as well as other greenhouse gas emissions, such as methane and nitrous oxide.