SKIFFERUGN

The present invention relates to a furnace 1 having a stove of the type comprising an insert 3 heated by the furnace, said insert comprising a passageway 4 for though- flow of a fluid to be heated. The insert 3 is generally tubular and arranged to carry in its interior flue gases flowing from the furnace in an upward direction. In the area at its upper end, the insert has an opening 7 for enabling the flue gases to flow out of the insert. Communicating with said opening, the stove has a channel 8 receiving the flue gases and carrying them in a downwards direction in the stove, said channel partly being delimited by the outside 9 of the insert proper.