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building energy efficiency methodology has been used to assess (energy audits) multifamily apartment block housing and different initiatives have been used in most cases based on a voluntary basis including also BEMA initiate projects. According to adopted Building Energy Efficiency Law the energy certification process of buildings must start on 1st January 2009.

The law determines 2 types of certificates. For new and renovated buildings a provisional certificate will be issued based on data available during the project phase. Provisional certificate will be issued for 2 years. For existing building stock energy certificate will be issued by the energy auditor for 10 years based on the actual consumption (measured energy rating) and calculations based on actual construction (calculated energy rating).

The building energy classification issue is still open to discussion.

Energy certification of Public Buildings is done according to requirements covered in EPBD article 7. The energy certificate has to be clearly visible if building total floor area exceeds 1000 sq.m. in buildings which are placed under the authority of the state or municipality organisation or public services provider.

Calculation procedures

Building energy efficiency calculation methodology is in place as draft version. It is based on CEN standards and prEN standard projects. Methodology covers heating, hot water, AC, ventilation, built-in lighting systems. For residential and non-residential buildings energy efficiency calculation procedures do not differ. Draft calculation methodology calculation is based on simulation process.

A special calculation software tool will be prepared after adoption of Building energy efficiency calculation methodology.

Requirements for new buildings and major reconstructions

According to Law on Building Energy Efficiency article 8 minimum energy efficiency requirements refer to: › new buildings; › major reconstruction where the total floor area exceeds 1000 sq.m. and where the total cost of major reconstruction exceed 25% of building cadastrial value or where major reconstruction construction works cover 25% of building total volume. There are requirements for the maximum permissible transmission heat loss coefficient of the external envelope and requirements of maximum permissible heat loss from buildings depending on type of building. These requirements are included in the Latvian Building code LBN 002-01 “Thermal requirements of the buildings envelopes” approved by the Cabinet of Ministers by the Regulation Nr.495 on November the 27th, 2001. In an amendment to LBN 002-01 from September 26th the requirement to indicate specific heat losses of the whole building and specific heat losses for 1m2 of floor space is included.

EPBD Buildings Platform > P128_EN_Latvia_July2008

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