Background

DHW heating in multi-story residential construction is a key challenge for energy efficiency, hygiene, and cost-effectiveness. Different systems, from central storage solutions to decentralized fresh-water modules, offer a wide range of technical approaches. To date, their impacts on energy demand, primary energy use, and costs have only been examined selectively. As part of a study commissioned by the State of Salzburg, existing and innovative systems are being systematically compared.

Project Objective

The study aims to analyze the energy and cost performance of four common DHW heating systems in combination with five heat generators. Based on a reference building, various scenarios are evaluated with regard to energy demand, primary energy use, and capital and operating costs. The results are intended to serve as a decision-making basis for future residential construction projects and to support planning processes in building services engineering.