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* Select venter according to the actual rated maximum GPH input. ComboVent GPH ratings at 100 psi.
Do not exceed maximum oil GPH input. For multiple venting system applications add the input for each.
Unit sizing may vary depending on specific application. Consult your dealer or factory representative for
the proper sizing for your particular application.
Sizing The Power Venter
SWG and ComboVent (CV)
MODEL
MAX*
OIL GPH
INPUT
100psi
MAX*
OIL GPH
INPUT
140psi
Maximum Equivalent Feet of Vent Pipe
VENT
PIPE SIZE
AT MAX
GPH INPUT
AT 60% OF MAX
GPH INPUT
SWG-3
N/A N/A
21 80 3"
50 100 4"
SWG-4HD, 4HDs, CV-4
1.10 .90
35 100 4"
65 100 5"
100 100 6"
100 100 7"
SWG-5, 5s, CV-5
1.85 1.55
16 44 4"
51 100 5"
95 100 6"
100 100 7"
SWG-6, 6s
2.65 2.25
28 78 5"
68 100 6"
100 100 7"
SWG-8
4.75 4.0
26 72 7"
51 100 8"
70 100 9"
SWG-10
9 7.5
10 100 8"
30 100 10"
75 100 12"
SWG-12
13.5 11.5
16 100 10"
40 100 12"
86 100 14"
SWG-14
21 17.75
8 85 12"
18 100 14"
35 100 16"
Table 1-
Sizing The Venter (Use Maximum GPH Input
)
Size the Power Venter based on the input firing rate of the
appliance. If the power venter is being used to vent multiple
appliances, add the input firing rates for each appliance and
use that total to size the venter. Knowing the total input GPH for
oil, the venter can be sized from Table 1. Select the venter rated
closest to the total input GPH for installation. If the input of the
appliance is higher than the max allowable for that size Power
Venter, move to the next larger size.
Do not select a venter with a maximum GPH lower than the
appliance. The equivalent feet of vent pipe for the installation
must be calculated. Based on the vent pipe diameter to be used,
compare the calculated equivalent feet of vent pipe with the
maximum equivalent feet allowable for the venter (see Table 1).
If the calculated equivalent feet is greater than that allowed for
the venter, increase the diameter of the vent pipe to be used and
refer to the table or use the next larger size Power Venter.
Note: In Table 1, the maximum equivalent footage allowable for the vent pipe is given for two points,
the maximum GPH venting capacity and at 60% of the maximum. This allows for estimating values
between the two given points.
7137FCHVentGuideOil_New:7137FCHVentGuideOil 5/8/08 10:44 AM Page 8