Building an energy-efficient house – A guide to modern and environmentally friendly living

energy-efficient-house-building-guide

Energy-efficient modern detached house with solar panels and green surroundings.

Learn how to build an energy-efficient home. We'll walk you through the most important design steps, material choices, and energy solutions that save the environment and money.

Energy efficiency is at the heart of modern house construction. It not only reduces environmental impacts, but also reduces living costs and improves living comfort. In this guide, we will go through what energy-efficient construction means, what the most important design factors are, and what materials and technical solutions should be used. You will also learn how the new Building Act affects energy efficiency requirements and how you can take advantage of subsidies.

Energy efficiency: An investment in the future and lower housing costs

Energy efficiency is at the heart of modern home construction. It not only reduces environmental impact, but also reduces living costs and improves living comfort. Building an energy-efficient home is a whole that consists of considered choices.

The cornerstones of an energy-efficient home:

  • High-quality insulation and U-values: The building envelope – walls, roof and subfloor – must be well insulated. The lower the U-value of a structure, the better its thermal insulation performance.
  • Tight structure: Air leaks are a significant energy drain. The tightness of structures is ensured through careful work and tightness measurements.
  • Modern heating system: Geothermal or air-to-water heat pump combined with water-circulating underfloor heating is an energy-efficient and popular solution.
  • Efficient ventilation: Ventilation with heat recovery (HRO) is a must in a sealed house. It ensures fresh indoor air and recovers heat from the exhaust air, which significantly saves heating energy.
  • Renewable energy: Solar panels are an excellent way to generate some of your home's electricity yourself and further reduce your electricity bill.

New Construction Act 2025 will further emphasize life-cycle thinking and low-carbon solutions, making energy efficiency even more important.

The most important points

  • Careful planning is the foundation of an energy-efficient house, taking into account, among other things, the wind directions, the shape of the building, and airtightness.
  • Environmentally friendly and effectively insulating materials, such as wood and high-quality insulation, improve energy efficiency and living comfort.
  • The choice of heating system, such as geothermal or air-to-water heat pump, has a decisive impact on energy consumption and operating costs.
  • Utilizing solar energy with solar panels increases energy self-sufficiency and reduces electricity bills.
  • The 2025 Construction Act sets even stricter energy efficiency and low-carbon requirements.
  • An energy-efficient house increases the value of the property and makes the home more attractive in the housing market.


Energy-efficient heating system and ventilation in a modern home.

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