Furnace insert for burning pieces of wood has a heating grate arranged at the base of the combustion shaft through which primary air can be introduced to a glowing bed zone

摘要

Furnace insert has a retort (1) having a combustion shaft (11) with a glowing bed zone (13), and a filling shaft (2) which opens laterally into the combustion shaft. A heating grate (12) is arranged at the base of the combustion shaft through which primary air (7) can be introduced to the glowing bed zone. Preferred Features: The insert has devices for laterally introducing secondary air (8) into a mixing zone (15) into the upper part of the combustion shaft.