27
8.6.11
Maximum length – concentric flue
The maximum length of the flue system is determined by the resistance of the components within the flue.
The resistance must not exceed 200 Pa.
The information shown in table 8.6.12 is for the Lochinvar supplied flue system only; other flue system suppliers
may have different values.
EF80
(80/125)
EF100
(100/150)
EF120
(100/150)
EF150
(100/150)
EF180
(100/150)
Wall terminal
22
19
24
40
48
Roof terminal
61
39
45
69
86
Straight tube (m)
12
8
10
14
16
45° Elbow
7
8
9
14
16
90° Elbow
13
11
13
22
28
8.6.12
Concentric flue component resistances (pa)
8.6.13
Worked example – concentric flue
Flue Resistance Calculation Example
EXAMPLE A
EF100 WATER HEATER WITH HORIZONTAL CONCENTRIC TERMINAL
3000mm VERTICAL FLUE LENGTH
6000mm HORIZONTAL FLUE LENGTH
90° BEND
EXAMPLE B
EF150 WATER HEATER WITH HORIZONTAL CONCENTRIC TERMINAL
3000mm VERTICAL FLUE LENGTH
600mm HORIZONTAL FLUE LENGTH
90° BEND
100/150mm Concentric flue
Example A
Item
Quantity
Resistance
Total
Wall terminal
1
19
19
Roof terminal
0
39
0
Straight tube (m)
9
8
72
45° Elbow
0
8
0
90° Elbow
1
11
11
Total Resistance (Pa)
141
141<200 FLUE SYSTEM DESIGN HAS PASSED
Example B
Item
Quantity
Resistance
Total
Wall terminal
1
40
40
Roof terminal
0
69
0
Straight tube (m)
9
14
126
45° Elbow
0
14
0
90° Elbow
1
22
22
Total Resistance (Pa)
228
228>200 FLUE SYSTEM DESIGN HAS FAILED USE TWIN PIPE OR CONVENTIONAL FLUE INSTEAD
Содержание EcoForce EF100
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