Because a wood-fired boiler usually produces more energy than is needed for that particular moment, an accumulator tank is needed to store the energy. The size of the tank depends on the size of the accommodation and the type of wood-fired boiler that is installed. As a rough guideline, a 1000 litre accumulator tank is sufficient for a house of up to 150 m². NIBE has accumulator tanks for different needs. From docking to wood-fired boilers or heat pumps in single family homes to installations in large properties.