Energy use in houses causes the indirect emission of Carbon Dioxide (CO2) and there is an increasing need to develop effective models to predict such emissions to establish benchmarks against which reductions can be targeted. The Prometheus model described in this thesis is such a tool which was developed under a holistic approach integrating the physical conditions of the house, climatic variations and also social variables all of which affect consumption. The model is sufficiently robust that with minimal modification in the extension of underlying databases it could be used in other areas within the UK.