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Product Description:


Who needs a Buffer storage?


In principle, everyone, because a buffer storage tank improves every heating system, increases efficiency and reduces operating costs.

Buffer for irregular needs: Fire produces a certain minimum amount of energy. The combustion process cannot be reduced indefinitely.


If very small amounts of energy are needed, this requirement can only be met with a buffer storage. If, for example, the heating requirement is lower than the energy generated by a boiler, the buffer stores the excess heat and then releases it gradually.


The boiler starts less often, so no energy is wasted. Conversely, if large amounts of energy are needed very suddenly, for example if a lot of hot water is needed at once, the boiler cannot react as quickly. But the buffer tank can.


ETA has developed a unique buffer layer charging concept, the heart of which is the buffer charging management. It knows exactly when and how much the storage tank should ideally be charged and when heat should be released to consumers again. The entire buffer management can be regulated and controlled via the touchscreen on the boiler or via the myETA internet platform.


Heat rises, cold sinks downwards:

This is a physical law that also applies to the water in the buffer. If the water were always introduced into the buffer at the same point, regardless of its temperature, there would be a lot of mixing in the buffer. This in turn would lead to energy losses. Instead, the water from the return flow of the heating or from the solar system, for example, is sent into the buffer exactly where it fits - the colder water further down, the warmer water further up.

The better the temperature stratification works, the better and more energetically efficient the buffer works. It is therefore important to move the water slowly. The inflowing water reaches the correct layering of the buffer via special ETA layer plates.


Layer by layer the right temperature.


The sensor tubes are installed in such a way that the control system can work optimally. An immersion sleeve no longer needs to be screwed in separately, it is already integrated. This means that sensors can be moved if necessary, even without having to drain the water.


  • Depending on the desired temperature, the heating water for hot water preparation

    always taken from the right place.

  • At 70 to 80 °C the flow from the boiler is fed in.

  • The radiators are fed with water between 45 and 65 °C.

  • Hot water between 45 and 100 °C is fed in by the solar system
    when the sun shines strongly

  • The return flow from the hot water tank is between 35 and 50 °C.

  • The return temperature from the radiators is between 35 and 45 °C.

  • The water from the solar system is between 30 and 45 °C
    when the sun shines just a little.

  • Hot water between 30 and 35 °C is fed into the underfloor heating.

  • The return flow to the boiler is between 25 and 35 °C.

  • The return flow from the fresh water module is between 25 and 35 °C.

  • The return temperature to the solar system is between 22 and 70 °C.

  • The return temperature from the underfloor heating is between 22 and 27 °C.


Shipping costs determined by location. 


€Price On Application Ex VAT


For More Information 'Contact Us'.

ETA stratified buffer storage SP and SPS

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