Efficient Energy

Alexander Russ: Mr Gerdes, how can Clage electric instantaneous water heaters help us switch our systems over to renewable energy sources?

Jörg A. Gerdes: Providing hot water is fundamentally different than is providing heat. In the first case, it is used for short periods because it is needed for showering or washing hands. That applies to your home, the office, or leisure time, say when you’re at the health club. Heating, by contrast, is used for much longer periods, whereby it requires much less heat. So why should I heat the hot water to 60°C via my heating system when I really only need about 38°C? That’s why it makes sense to separate your heating supply from the hot water supply and to only use the heating to provide the requisite 22°C of heat for the home. You can use an instantaneous water heater to supply your hot water. That way you immediately save a lot of energy.

How exactly does that work?

Jörg A. Gerdes: Let's take the example of the heat pump in combination with electric instantaneous water heaters: Modern electric instantaneous water heaters are smart devices that use a modern processor to provide the hot water precisely to the degree. If I now separate heating and hot water and use an E-flow heater to heat the water, the heat pump can generate the heating heat much more effectively. It is only used for the low room temperature of 22 degrees Celsius and can be switched off completely during the warm season. The electric instantaneous water heater can be precisely adjusted by the user to the respective use, such as kitchen or bathroom. The hot water is then immediately available at the desired temperature. In addition, I save a lot of wiring because I can install the electric instantaneous water heater close to consumption - for example, near the bathroom or kitchen.

What do architects have to consider when planning?

Jörg A. Gerdes: First of all they have to clarify with the client what exactly is needed for the building – let’s say, how many bathrooms need to be fitted. And it’s necessary to not only consider how many users there are at present but how many there could potentially be going forwards. On the basis of this information you can then work out how much hot water is needed and which is the most suitable electric instantaneous water. So it’s important to take all these factor into account when planning a building.

Are there specific devices for each application or is it possible to control a building via a central electric instantaneous water heater?

Jörg A. Gerdes: Both are possible. In multi-storey housing in Germany electric instantaneous water heaters are normally installed in the bathroom but it could just as easily be located in a facilities room. Then a suitable CLAGE applicance would be installed there. We can supply the right electric instantaneous water heater for every situation – be it for the kitchen, the bathroom or your washbasin.

What options are there for installing Clage electric instantaneous water heaters in a building?

Jörg A. Gerdes: We offer many options. For example, if architects want to plan a room so that the heater can’t be seen we would suggest our “ISX” electric instantaneous water heater which we showcased at this year’s ISH. “ISX” can be networked with the building management system and is ideal for concealed-in-the wall installation. Measuring just 41 x 28 x 10 centimeters the heater is very small and fits in a standard flush-mounted box. This means architects can deliver a minimalist spatial concept despite the building technology required. Moreover, “ISX” can be easily controlled via a Bluetooth remote control or alternatively via a smartphone or tablet. And using the free “Smart Control” app users have a wide range of monitoring functions at their fingertips. That makes it even simpler to provide hot water with an electric instantaneous water heater.

Tip: The hot water exhibition at Clage in Lüneburg. Get comprehensive advice here on the latest hot water technology.

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