For pellet stoves, a buffer memory is required?

Many pellet stove interested ask if is necessary for an exclusive space heating by a water-heating pellet stove installation of a buffer.

The answer is: yes and no.

Theoretically, direct heating from radiators through a water-heating pellet stove is possible because pellet stoves can be operated modulating. In other words, you can regulate in a pellet stove’s heat output according to heat demand.

In practice, however, such circuitry is not recommended. This would lead to frequent burner start and the pellet stove would often run into one of the efficiency of an unfavorableperformance range, which leads to increased pellet consumption and premature fouling of the lens.

The use of a buffer memory ensures even heat supply to the heating system. The pelletstove can be run at longer intervals in the most favorable operating performance range, which reduces wear and maintenance intervals and increase the life of your pellet stove.

The advantages of the circuit of a buffer with a pellet stove are clear, but how big shouldthe buffer be designed?

Buffer for pellet stoves properly dimensioned
The correct dimensioning of a buffer depends on several factors. In this article wedescribe the case when the pellet stove to be connected to the buffer memory alone,without consideration of other possibilities, such as a combination with solar or heat pump.

The design of a buffer for water heating pellet stove can be done using the followingformula:

Buffer storage volume = 35 liters of water per kilowatt-side pellet stove performance