The Commission is in the process of updating some of the content on this website in light of the withdrawal of the United Kingdom from the European Union. If the site contains content that does not yet reflect the withdrawal of the United Kingdom, it is unintentional and will be addressed.

Cost-efficient Nearly Zero-Energy Buildings (NZEBs)

Share this Post:
IOP publishing of the paper 'Cost-efficient Nearly Zero-Energy Buildings (NZEBs)'

IOP publishing of the paper 'Cost-efficient Nearly Zero-Energy Buildings (NZEBs)'

The CoNZEBs project formed the main part of a session at the IAQVEC conference in Bari in September 2019. CoNZEBs project partner held in total 6 presentations including a project overview, different project results and one of the national exemplary NZEB buildings presented in the end-user brochure. The papers are published as open source documents in IOP Conference Series: Materials Science and Engineering, Volume 609.


The paper 'Cost-efficient Nearly Zero-Energy Buildings (NZEBs)' summarises information on the project content and the overall project outcomes.




The next level of energy performance of new buildings within the European Union will be the Nearly Zero-Energy Building (NZEB). A lot of work has been spent on pilot and demonstration buildings on this and even higher energy performance levels throughout many EU countries. However, most of the high performance buildings realised so far result in additional investment costs when compared to the current national minimum energy performance requirements. The considerably higher investment costs are one of the main barriers to the early application of the NZEB-level in Europe. The EU Horizon 2020 project CoNZEBs works on technical solution sets that result in lower investment costs for NZEBs, bringing the costs close to those of conventional new buildings. The project focus is on multi-family houses. In each of the four participant countries Germany, Denmark, Italy and Slovenia a team of researchers is analysing which sets of market-ready technologies at the building envelope, the services systems for heating, domestic hot water, ventilation and cooling (where required) in combination with renewable energy systems can fulfil the NZEB requirements at lower costs than those incurred by the national mainstream NZEB application. Additional efforts are being spent on the life-cycle costs and the life-cycle analysis of the solution sets, as well as on the impact of future developments of primary energy factors, energy costs and technology efficiencies. Since details of the CoNZEBs work are presented in several additional papers, this document gives an overview of the different tasks and results that are available so far.


The paper with the doi 10.1088/1757-899X/609/6/062002 is available as open access at IOP Conference Series: Materials Science and Engineering, volume 609 and at the CoNZEBs website.




The CoNZEBs project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 754046. The paper reflects the authors’ views. The Commission is not responsible for any use that may be made of the information it contains.


In Germany, national co-funding is provided by Bundesministerium für Umwelt, Naturschutz, Bau und Reaktorsicherheit within the research initiative Zukunft Bau (SWD-