Domestic hot water heat pump ecodesign 400 WT

area of application
Single-family house, renovation (replacement for electric water heater)
Heat source
Ambient heat
Indoor installation
Power range
3.15 kW
ecodesign WP Boiler

Product details

The advantages of the ecodesign 400 WT at a glance:

  • 5-year warranty on memory and electronics
  • Water content 373L enables 1400L/day (40°C)
  • Powerful compressor for rapid reheating
  • Standard signal anode guarantees permanent corrosion protection
  • Multi-temperature model - year-round outdoor air intake possible ( -10°C to +35°C)
  • Integrated heat exchanger for connecting additional energy generators
  • Extremely quiet operation
  • Circulation connection
  • Highly efficient CFC-free thermal insulation ensures low standstill losses of only 30W!
  • Safe hygiene with the legionella program

Climate premium

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Do you have any questions?

Benefit from our many years of experience and let our specialists advise you individually, without obligation and free of charge.

Frequently asked questions?

An air-to-water heat pump extracts energy from the ambient air, transfers it to the refrigerant, and uses a compressor to produce heat that is used for heating and domestic hot water. In summer, the process can be modified for cooling.

A brine-to-water heat pump uses geothermal energy. To do this, it draws thermal energy from the ground and conducts the heat into the house. The heat extraction works even if the upper layer of the earth is frozen in winter, because the geothermal heat remains constant.

The heat pumps are suitable for both and and can thus be used in new buildings and renovation properties. The maximum flow temperature in continuous operation should not exceed 55°C, as the efficiency decreases sharply.

However, it is worth replacing the old radiators with new ones with a larger heating surface. Seek advice from specialists. In general, energy-saving measures on the building envelope to directly reduce the heat demand and thus the flow temperatures should be examined.

Yes, because all our heat pump systems are designed for the design temperature. However, there are some differences between the various heat pump systems that need to be considered:

Air-to-water heat pumps:

Air-to-water heat pumps have a lower operating limit of approx. -25°C. For heating systems, this means that the heat output is guaranteed up to the design temperature (in the midlands, for example, at -7°C outside temperature). If the outside temperature drops below this design temperature for one or more days, the auxiliary heating switches on automatically. Statistically, however, this case occurs only very rarely.

Brine-to-water heat pumps:

With these heat pumps, the correct dimensioning of the geothermal probes is important. The heat at depth is constant and changes only minimally, even if the upper layer of the earth is frozen.

The heat pump needs on average 7'200 kWh per year, but this is strongly dependent on the energy requirement of the building. A heat pump in combination with a photovoltaic system makes sense and helps to reduce the cost of electricity consumption.

The sound insulation of heat pumps can be improved by structural measures. The most important is the physical decoupling of floors, walls and pipes. Sound insulation hoods or sound insulation walls can also significantly reduce noise generation.

Heat pumps are in principle very low maintenance. However, a heat pump should not be neglected. Dirt on the outdoor unit or in the heating circuit, incorrect settings, wrong heating curve, etc., can damage the heat pump or its efficiency. Therefore, a periodic maintenance is always advantageous and extends the life expectancy.

Domestic hot water heat pump ecodesign 400 WT

area of applicationThe new extra robust ED 400 WT domestic hot water heat pump can be used wherever large quantities of hot water need to be available immediately.
must be available immediately. At the same time, it reduces operating costs to a minimum. Despite the large water content, the
ED 400 WT has a low overall height.

In addition to very cost-effective hot water generation, the ED 400 WT provides other additional benefits in terms of comfort and indoor climate.
and indoor climate. The ED 400 WT draws in ambient air (outside or inside the house) and expels cooler, drier air. As a
As a welcome side effect, cellar rooms can be dehumidified and the cool air can also be used for air conditioning in
kitchen, living room or bedroom, wine cellar etc.

Smart control:

  • Intelligent smart grid interface enables connectivity of photovoltaic systems and multi-tariff meters
  • Boost function - for short-term increased hot water demand
  • Timer function - you determine when the domestic hot water heat pump runs
  • Holiday function - reduces consumption during absence

Assembly and transportation:

  • Due to its low height and space requirements, the ED 400 WT fits into almost all installation rooms and replaces the drinking water storage tank
  • Easy handling thanks to unscrewable retaining bracket provides more transport protection during installation and placement in the installation room
  • Plug-and-play installation with pre-set controls saves time and guarantees simple operation