with firewood fired opvarmningsapparat in particular stove or fireplace

摘要

A heat-conducting cabinet (10) contains a primary combustion chamber (16) and a secondary combustion chamber (30) communicating with said primary chamber (16). A vertical baffle (28) oriented from top to bottom separates said combustion chambers. Part of this baffle (28) stops short of a lower surface of the cabinet to create an opening (31) which connects said primary and secondary chambers and allows the gases to circulate between them. A primary feed pipe (20) introduces air into said primary chamber (16). A secondary feed pipe (32) positioned at least along the baffle (28) oriented from the top introduces preheated air into the secondary combustion chamber (30) through the opening (31). An opening (26) through which the combustion products leave is located at the top of the cabinet (10) and is in communication with the secondary combustion chamber (30). The primary feed pipe (20) introduces the air into the primary combustion chamber (16) through virtually the whole of its width. IMAGE