Mikrofill ETHOS 70 - Resistance Table

INSTALLATION
18 TECHNICAL DOCUMENTATION
RESISTANCE TABLE
By using either concentric or the two pipe system, different flue lengths can be achieved. In case a concentric system is used, its length
should not exceed 12 metres.
CONCENTRIC FLUE SYSTEM
Model
Vertical Terminal
Horizontal Terminal
Straight Pipe / m
45° Bend
90° Bend
Vertical Terminal
Horizontal Terminal
Straight Pipe / m
45° Bend
90° Bend
TWO PIPE SYSTEM
Air Inlet
Flue Gas Outlet
Air Inlet
Flue Gas Outlet
Example of Calculation for the ETHOS 70 boiler:
Concentric 45° Bend x 2
Concentric 90° Bend x 1
Concentric Pipe 80/125mm, Vertical 3m + Horizontal 1m = Total 4m Concentric Straight Pipe
Vertical Terminal 80/125mm
Concentric 45° Bend:
Concentric 90° Bend:
Concentric Pipe 80/125mm:
Vertical Terminal 80/125mm:
Total Resistance:
ETHOS 130
-
-
-
-
-
143.4
138.3
14.5
19.9
42.7
-
-
-
-
-
-
-
-
3.4
3.8
16.6
42.0
25.0
6.1
7.0
30.2
ETHOS 110
-
-
-
-
-
94.1
90.7
9.8
13.2
29.4
-
-
-
-
-
-
-
-
2.4
2.7
11.7
35.0
18.0
4.0
4.5
19.5
ETHOS 90
-
-
-
-
-
72.6
70.0
7.3
10.1
21.3
-
-
-
-
-
-
-
-
1.7
1.9
8.4
29.0
12.0
3.1
3.6
15.4
ETHOS 70
65.0
79.7
9.3
12.1
14.6
-
-
-
-
-
4.9
6.8
8.1
36.0
19.0
8.9
12.4
14.7
-
-
-
-
-
-
-
-
▲ FIGURE 07. FLUE DISCHARGE RESISTANCE.
2 x 12.1
1 x 14.7
3 x 9.3
Total resistance is 138.6 Pa, so the boiler output is not changed by the resistance (lower than 140 Pa) and the total concentric
length is less than the maximum allowed 12 metres.
* Vertical terminal length includes 1 metre length.
Resistance
24.2 Pa
14.7 Pa
27.9 Pa
65.0 Pa*
138.6 Pa
2 pcs
1 pcs
3m
RESISTANCE SYSTEM (Pa)mm
80/125
80/125
80/125
80/125
80/125
110/150
110/150
110/150
110/150
110/150
80
80
80
80
80
80
80
80
100
100
100
100
100
100
100
100
Straight Pipe / m
45° Bend R = 0.5 D
90° Bend R = 1.0 D
Vertical Terminal
Horizontal Terminal
Straight Pipe / m
45° Bend R = 0.5 D
90° Bend R = 1.0 D
Straight Pipe / m
45° Bend R = 0.5 D
90° Bend R = 1.0 D
Vertical Terminal
Horizontal Terminal
Straight Pipe / m
45° Bend R = 0.5 D
90° Bend R = 1.0 D