BRE IP5/12 PDF

INTRODUCTION

Buildings generally use very-high-grade energy derived from fossil fuels (Figure 1). By recognising that the energy quality required in buildings varies significantly according to purpose, the energy supply can be adapted to maximise efficient use of resources. This integrated approach offers opportunities to maximise the use of freely available heat and renewable energy technology.

The aim of this Information Paper is to draw attention to the fact that energy has a quality aspect and that the energy quality used for heating often far exceeds that which is necessary. It explains how it is necessary not only to reduce energy demand but also to provide the energy needed in the most appropriate and beneficial manner. Appliances will always have to be supplied by high-quality energy in the form of electricity; it is, however, possible and advantageous to supply heat from lower-quality sources. The Appendix explains the scientific principles behind energy quality.