Buildings Total Energy Consumption as the Basis of Energy Certification

Buildings’ heat consumption certification scheme in Latvia exists since 2000. It is based on measured heat consumptions for the space heating and hot water supply corrected for the climatic conditions of particular year and number of inhabitants. With the support of EC LIFE program this system of buildings’ energy certification was successfully implemented in one medium size town of Latvia in 2002-2004. In order to comply fully with the requirements of the Directive 2002/91/EC on the energy performance of buildings the existing scheme is being modified to include full energy consumption of building that consists of heat consumption for space heating and hot water supply, gas consumption for cooking needs and electricity consumption. The paper presents analysis of the data on buildings full energy consumption gathered in Ogre town in 2003/2004. It gives new formula for the standardized annual specific energy consumption that includes also electricity and gas consumptions as well as the new rating scale. The paper for the first time shows buildings energy certification results made by the new scale in 2003/2004 and compares them with the certification results done earlier by the old scheme