Stratification buffer tanks make the application of solid fuel heating systems
almost as easy and comfortable as oil and gas boilers.
Our wood log boilers produce significantly more energy with one boiler filling during the
burn-off period than the heating system needs at that moment. The surplus of energy
provided by the heat generator is stored in the buffer tank. After the fire in the wood log boiler
is burned down the heat of the buffer tank is at the building’s and maybe at the hot water
The system can be fed with heat without permanently fueling the boiler. When dimensioning the wood log boiler system it is one’s goal to generally heat up the wood log boiler only once or twice per day in order to supply the building with heat twenty-fourseven. At the same time the heating comfort is increased by that.
The size of the buffer tank should be chosen in such a way that the amount of energy resulting from one boiler filling can be stored completely in the buffer tank. For an excellent operation of the system it is necessary to use a stratification buffer tank with smart layering and efficient energy utilization.
The buffer tank capacity should also perfectly match the application of other renewable energy sources. In practice a
total tank capacity of 50-70 liter per m² collector surface area has proven as useful. If a bigger tank capacity should be
necessary due to wood log boiler size (see top) as for the calculated optimal dimension of the solar system, than you
have to take care that the hydraulic integration of the solar system in order to load the tank has to take place in row,
e.g. SLS with 2 heat exchangers resp. several buffer in a row. It is important that idleness is guaranteed when
applying the collector and system technology.
With solar thermal systems the solar heat does not occur at the time as the heat requirements.
Most heat is needed in the morning and in the evening - either for room heating or for the
preparation of hot water. This always requires storage of the solar energy in a buffer or DHW
The size of the solar tank has to be aligned to the size of the collector area. If the tank’s capacity is too big no useful temperatures will be achieved in the tank, if the tank is tank’s capacity is too small the available solar energy is not used efficiently. Our technicians will be glad to advise you.
energetically perfect: per m² aperture surface approx. 50 liter buffer tank capacity.
Bigger tank capacities can store more solar energy and are economically reasonable.
The correct hydraulic integration is important in that case.