Recommended dimensioning of the boiler output power for wood gasification boilers:

For wood boilers, a decisive factor is how often the customer is able or willing to refuel the boiler. Therefore, the boiler output is not based on the heating demand of the building, but on the daily heating requirement.

Since the wood boiler must be filled manually, it requires the presence of the operator for heating up or refueling. During combustion, the wood gasification boiler can now supply the heating system as well as the buffer storage tank. The combustion time depends on the boiler output, the amount of wood logs filled in and the quality of the firewood. If a wood gasification boiler is sized exactly according to the heating demand, the operator would have to refill firewood immediately after combustion to avoid a heat deficiency and to prevent the building from cooling down too much. This is understandably not very useful. Therefore, a wood gasification boiler should be dimensioned, such that even on the coldest day, 2-3 boiler fillings are sufficient. For emergencies, an electric heater can be used as an additional heater in the buffer tank.