Plant for Heating by Combustion of a Solid Fuel

A heating plant comprising a combustion chamber for combustion of a solid fuel, an outlet from the combustion chamber, a heat exchanger arranged in connection with the combustion chamber, a flue duct connected to the outlet of the combustion chamber, which flue duct passes through the heat exchanger, such that heat energy in flue gases from the combustion chamber can be transferred to a cooling medium in the heat exchanger, an ash separator for separation of ash from the flue gases and positioned downstream from the heat exchanger, and a fan arranged in connection with the ash separator in order to draw the flue gases through the flue duct, wherein the flue duct and the fan are dimensioned to maintain a velocity of flow of at least 15 m/s in the flue duct, all the way from the outlet of the combustion chamber and up to the ash separator, in order to achieve a blasting effect on the inside of the flue duct by ash particles being drawn through the flue duct.