Domestic hot water

Access to hot water is nowadays an obvious standard for multifamily buildings. We have hot water available whenever and wherever needed – and preferably immediately. The latest building regulations (ASHRAE 188-2015, IEC 62395-2 and CIBSE TM13) demand domestic hot water systems to ensure best comfort and efficiency as well as the Legionella control measures. This means that each centralized building water system should be protected against Legionella not only via efficient filtration and disinfection but also by maintaining water temperature within the control limits in the legionellosis risk management plan.

DEVI electrical heating system for domestic hot water maintains water supply at the required temperature level and provides appropriate disinfection to suppress the Legionella bacteria.

Moreover, DEVI pipe tracing systems ensure hot water in all taps and savings when a circulating pipe system is unnecessary. They also reduce water waste as you can get hot water immediately. The solution can be used in domestic hot water (DHW) systems supplied by the Low temperature district heating (LTDH), which is a cost and energy efficient way of building water supply in urban areas.

The initial investment of DHW system without circulation means appx. 50% less pipes, insulation, valves, and pumps to be installed due to the fact that no return pipes and insulation are required. This means also that you don’t need additional space for return pipe, which gives more room in service ducts.

DEVI heating cables provide power only where needed adapting output according to the ambient temperature. Also, less pipes and smaller boilers requirements for the DHW means less heat losses in the system.

Application manual: Domestic hot water temperature maintenance system

This design guide presents DEVI’s recommendations for design and installation of Domestic Hot Water system. It provides guidance for a heating cable layout, electrical data and system configurations.