Abstract: In order to eliminate flue gases generated in combustion of fuels in heating stoves a heating stove (1) is designed with a duct (14) above the fireplace (5) and closeable by means of a damper (16), whereby the flue gases pass through the bed of embers generated during combustion. A hearth (6) for the bed of embers is designed with obliquely set flat surfaces (26) for attaining of a concentrated bed of embers. There is located in the combustion chamber (58) of the heating stove (1) below the hearth (6) an aperture (9), which communicates with flue ducts (11), which communicate in turn with a flue (20), which discharges the flue gases from the heating stove. By means of a filling hatch (15) access can be gained to the interior of the said duct (14) to fill the heating stove and its fireplace with fuel.