Appendix 1: Technical data
Model
55MF
Nominal output
8 kW
Flue connection (diameter)
150 mm
Weight
+/- 134 kg
Recommended fuel
Wood
Anthracite
Brown coal
briquettes
Fuel property, max. length
30 cm
20 - 30
3"- 6"- 7"
Mass flow of flue gasses
5.2 g/s
5.4 g/s
3.9 g/s
Flue gas temperature measured in the measurement
section
288 °C
298 °C
299 °C
Temperature measured at appliance exit
396 °C
385 °C
402 °C
Minimum draught
12 Pa
12 Pa
12 Pa
CO emission (13% O
2
)
0.08 %
0.07 %
0.09 %
NOx emission (13% O
2
)
87 mg/Nm³
125 mg/Nm³ 117 mg/Nm³
CnHm emission (13% O
2
)
68 mg/Nm³
59 mg/Nm³
73 mg/Nm³
Particulate emission
19 mg/Nm³
8 mg/Nm³
12 mg/Nm³
Efficiency
79.4 %
81.6 %
83.7 %
18
Subject to change because of technical improvements
Appendix 1: Technical data
Model
55MF
Nominal output
8 kW
Flue connection (diameter)
150 mm
Weight
+/- 134 kg
Recommended fuel
Wood
Anthracite
Brown coal
briquettes
Fuel property, max. length
30 cm
20 - 30
3"- 6"- 7"
Mass flow of flue gasses
5.2 g/s
5.4 g/s
3.9 g/s
Flue gas temperature measured in the measurement
section
288 °C
298 °C
299 °C
Temperature measured at appliance exit
396 °C
385 °C
402 °C
Minimum draught
12 Pa
12 Pa
12 Pa
CO emission (13% O
2
)
0.08 %
0.07 %
0.09 %
NOx emission (13% O
2
)
87 mg/Nm³
125 mg/Nm³ 117 mg/Nm³
CnHm emission (13% O
2
)
68 mg/Nm³
59 mg/Nm³
73 mg/Nm³
Particulate emission
19 mg/Nm³
8 mg/Nm³
12 mg/Nm³
Efficiency
79.4 %
81.6 %
83.7 %
18
Subject to change because of technical improvements
Feature
Unit
Result
DRU 55CB Wood
DRU 55MF Br Coal
DRU 55MF Anthracite
Direct heat
kW
8
8
8
Indirect heating
kW
X
X
X
Preferred fuel - (Other fuel)
Wood logs with ≤25% moisture
V - (X)
X - (X)
X - (X)
Compressed wood with <12% moisture
X - (V)
X - (V)
X - (V)
Other woody biomass
X - (X)
X - (X)
X - (X)
Non-woody biomass
X - (X)
X - (X)
X - (X)
Anthracite
X - (X)
X - (X)
V - (X)
Hard coke
X - (X)
X - (X)
X - (X)
Low temperature coke
X - (X)
X - (X)
X - (X)
Bituminous coke
X - (X)
X - (X)
X - (X)
Lignite briquettes
X - (X)
V - (X)
X - (X)
Peat briquettes
X - (X)
X - (X)
X - (X)
Blended fossil fuel briquettes
X - (X)
X - (X)
X - (X)
Other fossil fuel
X - (X)
X - (X)
X - (X)
Blended biomass and fossil fuel briquettes
X - (X)
X - (X)
X - (X)
Other blend of biomass and fossil fuel
X - (X)
X - (X)
X - (X)
Heat output
Unit
Result
Nominal heat output
P
nom
kW
8
Minimal heat output
P
min
kW
6
Characteristics when operating with the preferred fuel
Efficiency
η
s
%
79,4
83,7
81,6
Energy Efficiency Index (EEI):
EEI
106
113
110
Energy Class
A
A+
A+
Efficiency (NCV)
At nominal output
η
th,nom
%
79,4
83,7
81,6
At minimum output
η
th,min
%
X
X
X
Heat output or room temperature control
Two or more stages, no temperature control
V
V
V
