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11.12.4 E
D: C
XAMPLE
11.12.5 E
E: C
XAMPLE
58
/
ONCENTRIC FLUE GAS
AIR SUPPLY PIPE
Calculation example with given lengths: checking resistance.
Water heater type:
Diameter: 100/150 mm.
Straight tube m
Bend
Bend
Concentric terminal
resistance flue gas:
Diameter: 100/150 mm.
Straight tube m
Bend
Bend
Concentric terminal
resistance air supply:
Total resistance flue gas and air supply:
The total resistance is more than 200 Pa.
This flue gas / air supply system is NOT functional.
NOTE: specific resistance values are used in this example.
Flue and air pipes of other suppliers can have other values
W
ONCENTRIC SYSTEM
ALL OUTLET
Calculation example with given lengths: checking resistance.
Water heater type:
Diameter: 100/150 mm.
Straight tube m
Bend
Concentric terminal
resistance flue gas outlet:
Diameter: 100/150 mm.
Straight tube m
Bend
Concentric terminal
resistance air supply:
Total resistance flue gas outlet and air supply:
The total resistance is less than 200 Pa.
This flue gas / air supply system is functional.
E93.1804.014
(
-
)
ROOF
MOUNTED
EFW 85
total
45°
90°
roof
total
45°
90°
roof
C13 (
-
)
WALL
MOUNTED
EFW 85
total
90°
wall
total
90°
wall
Number
Pa
Pa total
11
2.9
31.9
2
6.4
12.8
3
10.2
30.6
1
31.2
31.2
106.5
Number
Pa
Pa total
11
9.2
101.2
2
8.1
16.2
3
11.7
35.1
1
43.3
43.3
195.8
302.3
Number
Pa
Pa total
9
2.9
26.1
1
10.2
10.2
1
10.8
10.8
47.1
Number
Pa
Pa total
9
9.2
82.8
1
11.7
11.7
1
43.3
43.3
137.8
184.9
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