Reference · Voigtländer · Drinking-water hygiene in buildings
A housing complex of 58 apartments, built to the German Passivhaus standard, needs about 22 m³ of drinking water a day. A Voigtländer system doses anolyte into the circulated water, of which about 20 m³ is in circulation.
65 → 45 °Cwarm-water temperature change, with energy cost savings of up to 30% at this building
Voigtländer's case study describes this site. The figures describe this installation, not a general performance guarantee.
Preventing Legionella in a housing complex is difficult because the water system is complex and the environments inside the building differ.
This complex has 58 apartments, is built to the German Passivhaus standard, which means a low energy profile, and has a drinking water requirement of roughly 22 m³. The client asked for a leading-practice solution and wanted energy consumption kept as low as possible.
The Voigtländer system doses anolyte into the water that circulates through the building, of which about 20 m³ is in circulation. It works on the bacteria in that circulated water and on the biofilm in the circuit.
A low water temperature raises the risk of contamination, Legionella in particular. Constant dosing of anolyte into the mains water is what keeps the water quality in hand under those conditions.
The project reports a warm-water temperature change of 65 → 45 °C and energy cost savings of up to 30% at this Passivhaus complex. These are site-specific results, not a guarantee for another building.
How the concept works
About 22 m³ a day for 58 apartments.
The Voigtländer generator produces anolyte.
Anolyte is dosed continuously into the mains water.
About 20 m³ circulates through the building.
A low water temperature raises the risk of contamination, so the dosing is continuous rather than occasional.
The technology
Inlet and water meter, brine tank, the three-chamber generator, anolyte tank, demand-led dosing, measurement and control. Press “Show me the process” to start the animated 3D diagram.
Modelled from the Voigtländer plant schematic of an anolyte system, in the drawing language of the home page. The cards show documented facts only, no invented figures.
What the documentation records
Source: Voigtländer case study, residential complex. All statements relate to this project.
What this project shows
Source: Voigtländer case study. All values relate to this site.
From reference to your project
This project shows one application. Explore the treatment approach and the decisions that matter before adapting it to your site.
Your building
The first step is a look at the water system, the circulation and the way the building is run. From there follow dosing, measurement and documentation.
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Send an analysis ›Residential complex, 58 apartmentsAbout 22 m³ a day, 20 m³ of it circulated.
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