Efficiency & approximate cost of running in Guernsey

Calorific value (energy) by volume, assuming 100% efficiency of combustion. Our Ray electric boilers are 99.5% & will run on the Superheat tariff
  • Liquid Propane Gas (LPG)* = 7.04kW/H/Litre
  • Butane Gas = 7.83kW/H/Litre
  • 28 sec central heating oil (kerosene) = 10.35kW/H/Litre
  • 35 sec central heating oil (gas oil/diesel) = 10.85kW/H/Litre
  • Anthracite nuts = 9.661kW/H/kg
  • Phurnacite = 9.083kW/H/kg
  • Wood (beech) @ <20% humidity = 4kW/H/kg
Cost per kW hour as at 12/11/07, Guernsey, CI
  • Electricity (Superheat tariff) = 4.76p
  • LPG Gas (Super Economy 24 tariff) @7.61p/'unit' = 7.61p +28.61p/day standing charge
  • Butane Gas @ £1.806/kg (15kg bottle), assuming 1.74l/kg = 13.2p
  • 28 sec central heating oil (kerosene) @46p/litre = 4.4p
    • (as at 4/01/08 this has risen to 47.93p/litre)
  • 35 sec central heating oil (gas oil/diesel) @44p/litre = 4.05p
  • Anthracite nuts = 3.96p
  • Phurnacite =
  • Wood @ £50/tonne = 1.25p
*LPG is Guernsey Gas's piped gas.

These figures are for use as an approximate guide only and we are not responsible for their accuracy. Futhermore, the prices change constantly, especially oil.

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