dominant scheme

water zone

flow of flue gases

insulating layer

1.Top door
2.Lower door
3.Door for burner
4.Hole’s lid for secondary draught
5.Connector for draught regulator R 3/4”
6.Tube connector for returning water
7.Tube connectror for supplying water

7-1.Connector for heat exchanger
8.Smoke tube
9.Hole for cleaning and hole for gass burner
10.Hole for cleaning back side
11.Ash shaker
12.Connector for filling and emptying R 1/2”1