Stuv 21 - Page 6

6
SN 132150- …
Stûv 21 - installation [en] - 04-2013
Standards, certification and technical characteristics (continuation)
Other technical characteristics
21/65CSF 21/65HSF 21/75SF 21/85SF 21/95SF 21/105SF
Minimum draught needed to obtain the
rated calorific output
12 Pa 12 Pa 12 Pa 12 Pa 12 Pa 12.4 Pa
Weight-flow ratio of smokes 11,3 g/s g/s g/s 10.3 g/s g/s 12.6 g/s
Average smoke temperature
at rated power
298 °C 329 °C 283 °C 293°C 304 °C 242°C
Minimum diameter of the duct for the
intake of outside combustion air
100 cm
2
100 cm
2
100 cm
2
100cm
2
100 cm
2
100cm
2
Optimum output range for usage 5-12 kW 8-13 kW 8-11 kW 8 - 14 kW 10-18 kW 7 - 19 kW
Range of wood consumption per hour
recommended at 12% humidity
1.5-3.5 kg 2.3-3.7 kg 2.2-3.1 kg 2.3- 4 kg 2.9-5.3 kg 1.9 - 5.1 kg
Maximum limit for consumption
of wood per hour to avoid overheating
the system
5.2 kg/h 5.5 kg/h 4.6 kg/h 5.8 kg/h 6.5 kg/h 6.4 kg/h
Maximum length of logs
in vertical position
33 cm 50 cm 50 cm 50 cm 50 cm 33 cm
Maximum length of logs
in horizontal position
33 cm 33 cm 50 cm 60 cm 70 cm 80 cm
System mass 155 kg 197 kg 182 kg 234 kg 292 kg 224 kg
21/75DF 21/85DF 21/95DF
Minimum draught needed to obtain
the rated calorific output
12 Pa 12 Pa 12 Pa
Weight-flow ratio of smokes 16,4 g/s 17,2 g/s 20,9 g/s
Average smoke temperature
at rated power
344 °C 368°C 375°C
Minimum diameter of the duct for
the intake of outside combustion air
200 cm
2
200 cm
2
200 cm
2
Optimum output range for usage 9-19 kW 11-21 kW 12-27 kW
Range of wood consumption per
hour recommended at 12% humidity
2,8-6,1 kg 3,3-6,3 kg 3,6-8,0 kg
Maximum limit for consumption
of wood per hour to avoid
overheating the system
6,8 kg/h 8,3 kg/h 9,9 kg/h
Maximum length of logs
in vertical position
- cm - cm - cm
Maximum length of logs
in horizontal position
50 cm 60 cm 70 cm
System mass 236 kg 297 kg 310 kg