Panel houses
Requirements for building houses with energy class A, A+, A++
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Energy classes and their requirements when building houses
The energy class indicates the energy efficiency of a building – it shows how much energy will be needed for heating, cooling, ventilation, lighting and hot water preparation of a house. In Lithuania, as in the entire European Union, the energy efficiency classes of buildings range from A++ (highest class) to G (lowest class).
Differences between energy classes:
- A++ class is the highest level of energy efficiency. Such houses use almost no energy from external sources, and most of the energy is produced using renewable sources (e.g. solar, geothermal or wind energy).
- Class A+ – these houses are characterized by very high energy efficiency and usually have advanced heating systems and effective insulation.
- Class A – energy consumption is low, but not yet as much renewable energy is used as in class A+ or A++.
- Class B – these buildings are quite energy efficient, but their insulation and heating systems are not as modern as in class A buildings.
- Classes C–G – these are lower energy classes, which indicate that the building lacks effective insulation and advanced technologies, which is why such buildings consume more energy.
Requirements for new houses:
From In 2021, new buildings in Lithuania must meet an energy efficiency class of at least A++. This means that buildings must be designed to be as efficient as possible and as less dependent on non-renewable energy sources as possible. Otherwise, you will not receive a building permit.How to achieve a high energy class:
- High-quality thermal insulation of appropriate thickness (for roof, walls and floors).
- Materials. Use of materials that meet the requirements and in sufficient quantity (thickness)
- Design and engineering. Proper design of all components, avoidance of cold bridges.
- Triple-glazed windows and airtight door solutions.
- Recuperative ventilation system, ensuring effective heat recovery.
- Integration of renewable energy sources (solar panels, heat pumps).