December 2011

Fuel Fuel price (p per unit) Unit  Pence per kWh (after boiler efficiency) Energy content (kWh per unit) CO2e emissions per kWh*
Electricity Standard Rate1 14.67 kWh 14.67 (100%) 1 0.594
Electricity Online Rate1 13.51 kWh 13.51 (100%) 1 0.594
Mains Gas Standard Rate2 4.58 kWh 5.09 (90%) 1 0.224
Mains Gas Online Rate2 4.21 kWh 4.68 (90%) 1 0.224
Kerosene3 65.51 Litre 7.43 (90%) 9.8 0.308
Gas oil4 78.01 Litre 8.33 (90%) 10.4 0.347
LPG5 47.31 Litre 7.90 (90%) 6.66 0.259
Butane6 132.32 Litre 18.45 (90%) 7.97 0.259
Propane7 68.36 Litre 10.74 (90%) 7.07 0.259
Seasoned Wood8 22.62 Kg 6.34 (85%) 4.20 0.019
Pellets9 27.21 Kg 6.54 (90%) 4.62 0.039
Smokeless fuel10 42.83 Kg 8.52 (75%) 6.7 0.413
Coal10 32.80 Kg 6.39 (75%) 6.85 0.413
GSHP11 13.51 kWh 4.22 (320%) 1 0.186
ASHP11 13.51 kWh 5.40 (250%) 1 0.237

*CO2 emissions (kg of CO2 per kWh) – These factors are based on DEFRA’s 2010 GHG fuel conversion factors.

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References:

1. Electricity: Based on an average of the 6 major electricity suppliers’ online prepayment, credit and direct debit tariffs, including standing charges and VAT, but not Economy 7. Taken from consumer focus.

2. Gas: Based on an average of the 6 major gas suppliers’ standard prepayment, credit and direct debit tariffs, including standing charges and VAT. Taken from consumer focus.

3. Kerosene: Based on an average prices from Boiler Juice Direct Oil , Heating Oil.

4. Gas Oil: Based on an average prices from Boiler Juice, Nationwide Fuels and Heating Oil.

5. LPG: Based on an average prices from Calor Gas - call 0800 626 626 or visit Extra Fuel.

6. Butane: Based on prices from Flogas.

7. Propane: Based on an average prices from: Flogas, and Calor Gas - 0800 662 663. Note: The bottled gas market is very competitive and prices vary. It is recommended that you contact as many suppliers as possible in your area for the best price. We have used the CO2eq factor of LPG, as both propane and butane are components of LPG and there is currently no specific GHG conversion factor for these

8. Seasoned Wood: Based on an average prices from Logs Coal UK, Dandy's Coal and Ignite Wood Fuel.  We have used the CO2 factor as there is currently no specific GHG CO2eq conversion factor for this.

Note: The values for seasoned logs have been updated based on the latest information on the Net CVs of Seasoned logs from Biomass Energy Centre. 

9. Wood Pellets: Based on average prices from Strawsons Energy- call 01777 248 749, Wood pellets stove, Forever fuels and Logs2U.

10. Smokeless fuel and coal: Based on average prices from Coal Delivery, Coals2U and Coal Merchant.

We have used the CO2eq factor of coal, as the components of smokeless fuels are coal-based and there is currently no specific GHG conversion factor for this.

11. GSHP (Ground Source Heat Pump) and ASHP (Air Source Heat Pump): Based on best electricity price taken from SAP 2005.

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