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S20 BIO

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When firewood is loaded, a single load can burn up to 30 hours.

A single load of sawdust briquettes can burn up to 4 days.

Solid fuel: firewood, timber waste, sawdust briquettes, wood chips.

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 damper
2. bi-thermal draught regulator
3. supporting stick
4. air heating chamber
5. smoke extraction flue
6. Switch damper (U – in universal boilers)
7. Telescopic air injection pipe
8. solid fuel loading doors
9. air distributor with a combustion chamber stabilizer
10. solid fuel
11. ash removal doors
12. lifting rope with a ring
13. hook
14. Flow pipe
15. return pipe
16. thermometer tip
17. 1,5 bars pressure safety valve tip
18. Bottom
19. grate (U – in universal and biomass boilers)

TECHNICAL SPECIFICATIONS

Boiler model	S20 BIO
Power (kW)	20
Heating area (m2) **	100-250
Fuel capacity (dm³)	210
Maximum amount of firewood (kg)	50
Maximum amount of pellets (kg)	130
Maximum amount of briquettes (kg)	60
Maximum amount of coal ( kg)	–
Wood burning on a minimum time mode (hours)	31,5
On maximum mode ***	6,1
Briquettes burning on a minimum time mode (hours)	72
On maximum mode ***	14
Wood pellets burning time on minimum mode (hours)	96
On maximum mode ***	24
Coal burning time on minimum mode (hours)	–
On maximum mode ***
Length of firewood (cm)	up to 45
Amount of water in the boiler (l)	40
Efficiency (%)	86,3
Water boiler pressure maximum (bar)	2,0
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 ground and chimney (mm)	1550
Height (mm)	2100
Depth (mm)	560
Weight ( kg)	236,5

*Power depends on the quality of fuel, heating needs for house, chimney draught.

** The boiler output is chosen according to a heating 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).