Wood-fired water heater - has draught-regulation shutters in main and auxiliary flues passing through water chamber

摘要

The wood-fired water heater has a combustion chamber in upper and lower parts inside the water chamber. There are several heater tubes passing from the lower part to a smoke box at the lower end of a flue extending upwards through the water collector chamber and also the top part of the water chamber. A first damper (52) regulates the draught up the flue (20), in which it is mounted. A smaller-distance auxiliary flue (54) contains a second draught-regulation damper (55), and extends from the combustion chamber (15) through the water chamber (2).