Energy Efficiency Rating Current Potential Very energy efficient - lower running costs A 92 plus B 81-91 82 C 69-80 D 85-60 59 E 39-54 F 21-38 G 1-20 Not energy efficient - higher running costs Technical Information Benchmarks Main heating type and fuel: Boiler and radiators, oil Average for Total floor area: 147 m York D57 Approximate energy use: 260 KWh mr per year Approximate CO, emissions: 75 kg m per year Dwelling type: Detached house a. What is the main fuel source or sources used to heat the house and how is the energy in the fuel converted to useful heat energy? (One or two sentences.) (3 marks) b. Using the approximate value of energy use for each square metre of floor area stated on the EPC, what is the approximate total energy used in the property in one year? (State your answer in SI units to the appropriate number of significant figures and explain how you have carried out your calculations.) (4 marks) c. Using the approximate value of CO2 emissions for each square metre of floor area stated on the EPC, what is the approximate total CO2 emissions from the property in one year? (State your answer in SI units to the appropriate number of significant figures and explain how you have carried out your calculations.)