The current target to decrease the energy consumption of buildings is important as the residential sector consumes a significant part of the energy over the energy chain. Another driver is to reduce greenhouse gas emissions to tackle global warming. Renewable energy sources and technical solutions should play the main role in this pursuit. In this paper, a zero-energy log house in southern Finland is analyzed in detail. The analysis consists of the design, construction, and practical use during the years 2017–2019. The objective of the study is to show that a highly energy efficient log house can be achieved in Nordic conditions without additional insulation by utilizing renewable energy sources and energy technical solutions. The energy efficiency of the house is clearly higher than defined in the national nearly zero-energy building (nZEB) regulations. The house has a plus energy classification and carbon negative emissions for the energy. The operational cost of electricity is on both sides of zero.

当前的降低建筑物能耗的目标非常重要，因为住宅部门在能源链中消耗了很大一部分能源。另一个驱动因素是减少温室气体排放以应对全球变暖。在这一追求中，可再生能源和技术解决方案应发挥主要作用。本文详细分析了芬兰南部的零能耗木屋。该分析包括2017-2019年期间的设计，构造和实际使用。该研究的目的是表明，通过利用可再生能源和能源技术解决方案，可以在北欧条件下实现高能效的木屋，而无需额外的绝缘。房屋的能源效率明显高于国家近乎零能耗的建筑（nZEB）法规中定义的能量效率。房屋的能源分类为正，能源的碳负排放为负。电力的运营成本为零。