Stropus S20U – 20 kw
When the firewood is loaded, a single load burns up to about 30 hours.
A single load of sawdust briquettes burns up to 4 days.
Solid fuel: firewood, timber waste, sawdust, straw, peat briquettes and coal.
Combustion duration of solid fuel load depends on its quality of fuel, outdoor and indoor temperature, thermal resistance, and other factors.
Recommended moisture ≤30%*
BOILER CONSTRUCTION
- 1. Air valve
- 2. Air heating chamber
- 3. Smoke outlet
- 4. Switch valve (only for U boilers)
- 5. Telescopic air supply pipe
- 6. Fuel loading opening
- 7. Air distributor
- 8. Ash removal opening
- 9. Lifting cord with ring
- 10. Hook
- 11. Hot water pipe
- 12. Returning water pipe
- 13. Thermometer coupling
- 14. Pressure relief valve coupling 1,5
- 15. Traction regulator coupling
- 16. Bottom
- 17. Fire grate (only for U and BIO boilers)
- 18. Deflectors
- 19. Air supply ventilator
- 20. Fuel
Technical specifications
| Boiler model | S20 U |
| Power (kW)* | 20 |
| Heating area(m²)** | 100-250 |
| Fuel capacity (dm³) | 153 |
| Maximum amount of firewood (kg) | 40 |
| Maximum amount of wood pellets (kg) | 100 |
| Maximum amount of briquettes (kg) | 46 |
| Maximum amount of coals(kg) | 106 |
| Wood burning time on minimum mode (hours) | 31.5 |
| On maximum mode *** | 6.1 |
| Wood pellets burning time on minimum mode (hours) | 72 |
| On maximum mode ***- | |
| Briquettes burning time on minimum mode(hours) | 96 |
| On maximum mode *** | 24 |
| Coal burning time on minimum mode (hours) | 130 |
| On maximum mode *** | 32 |
| Length of firewood up to (cm) | 45 |
| Amount of water in the boiler (l) | 36 |
| Efficiency (%) | 86.8 |
| Pressure safety valve (bar) | 1.5 |
| Chimney draught (Pa) | 10-20 |
| Flow of heated water (l/h) | 500 |
| Water temperature in the boiler (°C) | 85 |
| Minimal area of chimney flue (cm²) | 250 |
| Chimney diameter (mm) | 180 |
| Distance between boiler bottom and chimney (mm) | 1477 |
| Height (mm) | 1970 |
| Diameter (mm) | 560 |
| Weight (kg) | 219 |
*Power depends on the quality of the solid fuel, heating need of the house and the chimney draught.
** The boiler output is chosen according to a heated area. E.g., solid fuel is burning the whole day (20-24 hours) in the solid fuel boiler Stropuva S20 in the 200 m² building whereas the firewood is burning almost 2 days (35-40 hours) in the solid fuel boiler Stropuva S40 in the house of the same area. A solid fuel boiler Stropuva S10 also can be used but the building will warms up slowly and the boiler would have to be loaded 2-3 times a day.
*** Combustion duration depends on the quality of fuel, outdoor and indoor temperature, thermal resistance, the power of boiler, and the way recommendations of user guide are complied (boiler installation, heated water stream, water temperature maintenance).
You can download the product instruction by clicking on the link below:
Parsiųsti instrukciją (Lietuvių kalba)