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Energy performance certificates for buildings required in new format


Energy performance certificates for buildings will be registered only if drawn up with new software called NRG3 as of the 1st of April. Developed by the Construction Products Certification Centre and partners on behalf of the Ministry of Environment, it will help to assess data quickly and accurately when it comes to identifying the energy performance class of a building.

Based on the new application, the energy performance class for buildings is determined according to eight parameters. These include heat losses of the building’s barriers, thermal energy costs to heat the building, its leak-tightness, technical parameters of the system of mechanical ventilation with recuperation, thermal properties of partitions and floors, efficiency of using primary non-renewable energy for heating, ventilation, conditioning and lighting as well as for producing hot water for households and the share of consumed energy which comes from renewable resources. None of these parameters are prioritised. The figures calculated against all eight parameters must meet the requirements for a specific class. The application requires first to calculate how much energy a building consumes every month and then to assess the annual energy needs of that building.

If you want to design a building which consumes as little energy as possible, you need both expertise and very accurate calculations. So it works best when an energy performance certification expert are involved in the planning process at an early stage. Co-operation between an architect, a certification expert and a constructor is the key to the best outcome.

Public information division
19 February 2015

Minister of Environment of Lithuania Kęstutis Navickas
Minister of Environment of Lithuania Kęstutis Navickas