32
8.8.3
E
XAMPLE
A:
T
WIN PIPE SYSTEM
Calculation example:
The total resistance is less than 200 Pa, so this is acceptable.
Boiler type:
S-CB
+
400
Flue gas
Diameter: 200 mm.
Number
Pa
Pa total
Straight tube m¹
total
13
1,8
23,4
T-piece
outlet
1
16,7
16,7
Bend
90°
2
6,5
13
Flue outlet
Zeta=0,05
1
0,9
0,9
Total resistance flue gas outlet:
54,0
A
ir
su
pp
ly
Diameter: 200 mm.
Number
Pa
Pa total
Straight tube m¹
total
7
1,3
9,1
T-piece
inlet
1
17,5
17,5
Bend
90°
2
4,9
9,8
Air inlet
Zeta=1,0
1
14,0
14,0
Total resistance air supply:
50,4
Total resistance flue gas outlet and air supply:
104,4 Pa
INLET AIR MUST BE CLEAN
AND FREE OF WATER.
USE A WIRE MESH WHEN
THERE IS RISK OF DEBRIS
BEING DRAWN INTO THE
AIR INLET.
EXAMPLE A
8m
3m
1m
2m
2m
4m
INLET AIR MUST BE
CLEAN AND FREE OF
WATER. ALWAYS USE A
WIRE MESH TO
PREVENT DEBRIS
BEING DRAWN INTO
THE AIR INLET.
