MICROPOWER is one of a number of terms used to express the small scale generation of electricity. Other phraseology expressions include: Micro generation MicroCHP Embedded Generation Distributed Power It is normally incorporated with the supply of heat and ventilation for pronounced efficiency. The resurgence of small, more localized power has produced a diverse utility, cleaner, quieter and more efficient than their ancestors of earlier years. The new MICROPOWER technologies are scaled to the electrical power demands of todays world. Small scale power can be planned, sited and built more speedily than large unit systems. Size can be adjusted to match demand and small plants are unlikely to fail simultaneously, hence a more reliable system coverage reducing grid losses. Small scale power customarily emits lower quantities of particulates-Sulphur Dioxide, Nitrogen Oxides and Carbon Dioxide. Advanced gas microturbines derived from aerospace jet engines are being mass produced and installed in hospitals, restaurants and other commercial buildings. Externally heated "STIRLING ENGINES" which use renewable fuels like biogas woodchips to warm a gas that drives pistons are becoming increasingly popular in European Homes.