Challenges of harmonizing energy efficiency and drinking water hygiene

Authors

  • Mária EÖRDÖGHNÉ MIKLÓS Pécsi Tudományegyetem, Műszaki és Informatikai Kar
  • Balázs CAKÓ Pécsi Tudományegyetem, Műszaki és Informatikai Kar
  • Gábor LOCH Pécsi Tudományegyetem, Műszaki és Informatikai Kar

DOI:

https://doi.org/10.66987/EPKO.2026.07

Keywords:

drinking water hygiene, Legionella risk, drinking watenergy efficiency of domestic hot water systems, stagnant water network, legionella disinfection, stagnant water network,water supply system volume minimization

Abstract

Energy-efficiency improvements in building services systems are increasingly encouraging the use of domestic hot water (DHW) systems operating at lower temperatures; however, this may introduce new drinking water hygiene risks. The prevention of Legionella growth in DHW systems has traditionally relied on high storage and circulation temperatures, which involves significant energy consumption. Low-temperature heat supply systems and modern DHW production solutions necessitate the application of new hygiene strategies and require an integrated risk management approach.

References

[1] A. Bürschgens és M. Pagel, „Die ganze Welt der Trinkwasserhygiene - Der Ratgeber für Praxis”, Kaarst: Honeywell GmbH, 2013.

[2] M. Eördöghné Miklós, „Investigation of energy efficiency of pumping systems by a newly specified energy parameter,” in EXPRES 2019 : 11th International Symposium on Exploitation of Renewable Energy sources and Efficiency, Subotica, Vajdasági Magyar Mérnökök és Műszakiak Egyesülete, 2019.

[3] C. Schauer és e. al, Hygiene in potable water installations in buildings – Requirements for design, deployment, operation and maintenance., Brussel: Rehva, 2019.

https://www.researchgate.net/publication/357930215_Hygiene_in_Potable_Water_Installations_in_Buildings_Requirements_for_Design_Deployment_Operation_and_Maintenance

[4] B. e. a. Kaj, „New measures for reducing legionella in hot water systems”, Danish Technological Institut, Hot Cool, 2023.

[5] X. Yang, H. Li és S. Svendsen, „Alternative solutions for inhibiting Legionella in domestic hot water systems based on low-temperature district heating,” Building Services Engineering Research & Technology, %1. Kötet 37 (4), 2015. https://doi.org/10.1177/0143624415613945

[6] M. Eördöghné Miklós, „Legionella-mentesítési megoldások vízhálózatokban,” Magyar Épületgépészet, 2016. https://www.researchgate.net/publication/364657634_Legionella-mentesitesi_megoldasok_vizhalozatokban

[7] Cheng YW et al., „Disinfection of Legionella pneumophila by photocatalytic oxidation,” Water Research, pp. 842-852, 2007.

[8] Vonberg, RP, „ Impact of a silver layer on the membrane of tap water filters on the microbiological quality of filtered water,” BMC Infectious Diseases, p. 133, 2008.

[9] A. P. a. M. A. E. William J. Rhoads, „Survey of green building water systems reveals elevated water age and water quality concerns,” Environmental Science Water Research & Technology, 2016. chrome-extension:// efaidnbmnnnibpcajpcglclefindmkaj/https://pubs.rsc.org/en/content/articlepdf/2016/ew/c5ew00221d

[10] J. Knutsson és J. Wallin, „Optimizing energy efficiency and legionella control in hot water circulation systems: laboratory validation and field assessment in Swedish multifamily buildings,” Energy Nexus, 03 2026. https://www.sciencedirect.com/science/article/pii/S2772427125002517

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Published

2026-06-12

Issue

XXX. Nemzetközi Építéstudományi Konferencia

Section

ÉPKO

License

Copyright (c) 2026 Mária EÖRDÖGHNÉ Dr. MIKLÓS, Balázs CAKÓ, Gábor LOCH

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.