TGD L 2011 – 1.1.2 – LIMITATION OF PRIMARY ENERGY USE AND CO2 EMISSIONS

1.1.2 The performance criteria are based on the relative values of the calculated primary energy consumption and CO2 emissions of a dwelling being assessed, and similar calculated values for a reference dwelling. Details of the reference dwelling are given in Appendix C. The criteria are determined as follows: – – primary energy consumption and CO2 emissions for both the proposed dwelling and the reference dwelling are calculated using DEAP; – the calculated primary energy consumption of the proposed dwelling is divided by that of the reference dwelling, the result being the energy performance coefficient (EPC) of the proposed dwelling. To demonstrate that an acceptable primary energy consumption rate has been achieved, the calculated EPC of the dwelling being assessed should be no greater than the Maximum Permitted Energy Performance Coefficient (MPEPC). The MPEPC is 0.4; – the calculated CO2 emission rate of the proposed dwelling is divided by that of the reference dwelling, the result being the carbon performance coefficient (CPC) of the proposed dwelling. To demonstrate that an acceptable CO2 emission rate has been achieved, the calculated CPC of the dwelling being assessed should be no greater than the Maximum Permitted Carbon Performance Coefficient (MPCPC). The MPCPC is 0.46. The DEAP software will calculate the EPC and CPC of the dwelling being assessed and clearly indicate whether compliance with the requirements of Regulation L3(a) has been achieved

C:BCARTGDtgd LTGD%20L%20DWELLINGS%20-%202011TGD%20L%20-%20DWELLINGS%202011%20-%20SECTION%201.1.2.pdf