September 12, 2025EnergiesOpen Access

A Wastewater Heat Recovery System as a Solution to Improve the Energy Efficiency of Buildings and Reduce Greenhouse Gas Emissions: Technical, Financial, and Environmental Aspects

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Wastewater heat recovery systems reduced energy demand for hot water by up to 64.7%, showcasing significant savings.
A life cycle cost analysis indicated traditional heating methods are less cost-effective than wastewater heat exchangers in all scenarios.
Integration of DWHR exchangers leads to substantial reductions in greenhouse gas emissions compared to conventional water heating methods.
The horizontal and vertical DWHR systems provide viable alternatives for enhancing energy efficiency in domestic settings.

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Analysis reveals wastewater heat recovery systems improve energy savings and lower CO2 emissions, suggesting benefits for the building sector.

Stec et al. (2025) studied this question.

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Analysis reveals wastewater heat recovery systems improve energy savings and lower CO2 emissions, suggesting benefits for the building sector.