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11.12.2 E
B: T
XAMPLE
Note:
The resistance values used are for Lochinvar supplied M&G flue pipe only, flue supplied via third parties will
have different resistance values.
WIN PIPE SYSTEM WITH CONCENTRIC ROOF TERMINAL
Calculation example with given lengths: checking resistance
Water heater type:
Diameter: 100 mm
Straight tube /m
Bend
Roof terminal
Adaptor conc./par.
Total resistance flue gas outlet:
Diameter: 100 mm
Straight tube /m
Bend
Roof terminal
Adaptor conc./par.
Total resistance air supply:
Total resistance flue gas outlet and air supply:
The total resistance is more than 200 Pa.
This flue gas / air supply system is NOT functional.
E93.1804.014
EFW 125
Number
total
6
90°
2
concentric
1
100/150
100-100 >
1
100/150
Number
total
6
90°
2
concentric
1
100/150
100-100 >
1
100/150
Pa
Pa total
6.0
36.0
21.9
43.8
66.7
66.7
0.9
0.9
147.4
Pa
Pa total
6.9
41.4
25.3
50.6
92.4
92.4
83.8
83.8
268.2
415.6 Pa
55
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