Guidance Notes

1. Oil has an approximate calorific value of 10.5kWh per litre. So multiply the number of litres used by 10.5 to get a kWh figure for oil input.
2. LPG has an approximate calorific value of 7.11kWh per litre. So multiply the number of litres used by 7.11 to get a kWh figure for LPG input.
3. Natural gas is invoiced in kWh, so there is no conversion required.
4. Typical boiler efficiency is 70-85%, depending on boiler type, age and condition. Multiplying fuel input in kWh by boiler efficiency will give boiler output in kWh.
5. If you would like to discuss this further call us now on 01 462 5000.