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Appendix B: Flue restrictor
Determining of the right flue restrictor:
•
Calculate the total horizontal- and vertical length of the flue, according to the
calculations displayed above
•
Determine according to the table the right flue restrictor size
•
When meeting an X, and when the values are outside the table, the combination is
not allowed
•
Normally the 30 mm flue restrictor is preinstalled
Relaxed
Horizontal length (m)
L
0
1
0
x
x
0.5
x
x
1
0
0
1.5
30
30
2
30
30
3
40
30
4
40
40
5
50
40
6
50
50
7
50
50
8
60
50
9
60
60
10
65
60
11
65
65
12
65
x
2
3
4
5
x
x
x
x
x
x
x
x
0
x
x
x
0
0
x
x
30
0
0
0
30
30
0
0
30
30
30
0
40
30
30
30
40
40
30
30
50
40
40
40
50
40
40
x
50
50
x
x
60
x
x
x
x
x
x
x
x
x
x
x
UK
IRL
6
x
x
X
X
0
0
0
0
0
x
x
x
x
x
x
>
>
>
> 18
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