Notations:
1. Ash door
2. Fuel door
3. Soot cleaning door
4. Smoke shutter
5. Thermometer seat
6. Hot water dumping (DN50)
7. Draught regulator
8. Smoke fumes output
9. Seat of safety valve 1/2''
10. Convective part
11. Furnace
12. Air supply door
13. Plug
14. Cast-iron furnace bar
15. Water supply pipe (DN50)
16. Turbulence promoter