What are the advantages of decentralised instantaneous water heaters over centralised DHW systems?
Solutions for efficient DHW heating are differentiated into centralised and decentralised concepts. Centralised DHW solutions are mostly DHW cylinders that are heated by the central heating system – a heat pump or the oil or gas burner. In this case, reasonable efficiency levels dissipate through long supply lines. The actual energy efficiency of the system usually only comes to light in the end-of-year bill. This is because many cost factors, such as DHW circulation, cylinder losses, standby energy losses and distribution losses result in high energy consumption. Such factors are seldom recognised as DHW costs. If these hidden costs are also taken into account, then decentralised electric DHW heating systems are often more economical than centralised systems. This has been verified by various different studies.
Decentralised DHW provision offers many benefits:
1. Close to the point of use
DHW heating appliances are fitted precisely where they are required: at the kitchen sink, at the washbasin, next to the shower or over the bath.
2. Energy saving
Short pipe runs, due to installation directly on site, ensure that heat loss is reduced to a minimum. This saves energy and protects the environment.
3. Water saving
Short pipe runs also mean that there is no cooled water in the supply line, which needs to run off unused when hot water is drawn. If it is drawn directly at the source, no precious water is lost.
Since decentralised electric DHW appliances utilise all the energy, they make for a particularly economical system.
5. Easy to fit
Our DHW appliances for decentralised DHW provision are quick and easy to install – even when replacing older appliances. This limits expenditure and saves time.
6. Accurate billing
In apartment buildings, the possibility of accurate individual billing is very much appreciated. Everyone pays for what they use – not a penny more.