It is estimated that more than 70% of the detached single-family houses in Poland (3.6 million) have no, or inadequate, thermal insulation. Heating technology is outdated and the most frequently used fuel is coal, burned in old coal-fired boilers, largely contributing to air pollution.
Only 1% of all houses in Poland can be considered as energy efficient and were mainly built in the last few years. Data from the Central Statistical Office2 indicate that about 50% of the residential buildings in Poland have been insulated, but in the vast majority of cases, to a sub-optimal level. Given that the economic case for improving the insulation of these partially insulated buildings is not favourable, it can be concluded that the remaining 50% of buildings should be prioritized for renovation. Acceleration of the cost-effective renovation of existing buildings can improve the energy efficiency in Poland. At the same time this is the easiest and fastest way of gaining energy savings.
The main objective of the briefing is to present possible nearly Zero Energy Building (nZEB) requirements for renovation of single-family houses in Poland. In the briefing, the need to accelerate the cost-effective renovation of existing buildings in Poland is highlighted as the easiest and fastest way of gaining energy savings.
The briefing proposes a definition of nZEB renovation for single-family houses and the related requirements and concludes that implementation of anti-smog regulations in Poland, referring to quality of fuel and boilers, will increase the energy price and stimulate the renovation process.