NZEB Renovation Definition in a Heating Dominated Climate: Case Study of Poland

Szymon Firląg , Michał Piasecki


The main objective of this article is to propose possible requirements for NZEB (nearly zero-energy buildings) renovation definition in heating dominated climate. A survey was carried out on potential approaches and indicators that could be used for the NZEB definition of existing single-family houses in Poland. The process of determining requirements for the NZEB renovation definition was divided into two stages. The cost-optimal U-values of the building’s envelope were initially calculated and, based on them, the energy demand for heating (QH) and the reduction of non-renewable primary energy demand (QP) were estimated. The calculations were made for different energy prices, locations, and two building models. Based on them the requirements for cost-optimal renovation (QH ≤ 60 kWh/(m² year), QP reduction ≥ 75%) and NZEB renovation (QH ≤ 40 kWh/(m² year), QP reduction ≥ 80%) were proposed. In contrast to definitions using only a maximum level of QP, two indicators were used. Such a solution is appropriate for existing buildings because it prevents the situation in which only renewable energy sources (RES) (with a low primary energy factor) will be applied in order to decrease the primary, non-renewable energy demand.
Author Szymon Firląg (FCE / ICE)
Szymon Firląg,,
- The Institute of Civil Engineering
, Michał Piasecki
Michał Piasecki,,
Journal seriesApplied Sciences-Basel, ISSN 2076-3417
Issue year2018
Publication size in sheets1.2
Keywords in EnglishNZEB renovation; cost-optimal; single family house
ASJC Classification1507 Fluid Flow and Transfer Processes; 1706 Computer Science Applications; 1508 Process Chemistry and Technology; 2200 General Engineering; 3105 Instrumentation; 2500 General Materials Science
Languageen angielski
applsci-08-01605-v3.pdf 2.99 MB
Score (nominal)25
Score sourcejournalList
ScoreMinisterial score = 25.0, 20-04-2020, ArticleFromJournal
Publication indicators WoS Citations = 4; Scopus Citations = 5; GS Citations = 15.0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.985; WoS Impact Factor: 2018 = 2.217 (2) - 2018=2.287 (5)
Citation count*16 (2020-05-11)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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