Specification

5
SWG
Power Venter
To calculate the footage, add the lengths of all the straight
lengths of vent pipe to the equivalent feet of all the vent pipe
fittings, such as tees, elbows, and reducers.
Procedure
1. Calculate the total equivalent feet for each type of fitting
used in the venting system from Table 3.
2. Calculate the total amount of feet for the straight lengths
of vent pipe.
3. Add the equivalent feet of the fittings with the total amount
of feet of straight length pipe. This will approximate the
total equivalent feet of the vent system.
Example:
System Pipe Size = 4"
Step 1 2-90° Elbows (4") = 14 Ft.
Step 2 10-2 Ft. Lengths of 4" Pipe = 20 Ft.
Step 3 Total Equivalent Feet = 14 Ft. + 20 Ft. = 34 Ft.
To estimate the equivalent foot length of the Reducer/Increaser chart, find the
figure at the intersection of the small pipe size and the large pipe size.
Table 3
Calculating Equivalent Feet of a Vent System
*10" or larger should be 10 ft. minimum above public walkway.
**10" or larger should be 4 ft. above finished grade.
(Planning the Vent System)
Using a Reducer/Increaser
Small Pipe Size
3" 4" 5" 6" 7" 8" 9" 10" 12" 14"
3" 0
4" 2 0
5" 4 2 0
6" 5 4 2 0
7" 6 5 4 1 0
8" 7 7 6 3 2 0
9" 7 8 7 5 4 2 0
10" 8 8 8 6 6 4 2 0
12" 8 10 10 8 9 8 6 4 0
14" 9 10 12 10 12 11 9 8 3 0
16" 9 11 12 11 14 13 13 11 8 3
18" 9 11 13 12 15 15 15 14 11 7
20" 9 12 14 13 16 17 17 17 15 11
Large Pipe Size
Vent Pipe
Fittings
Vent Pipe Diameter
3" 4" 5" 6" 7" 8" 9" 10" 12" 14"
Tee
19 25 31 38 44 50 56 63 75 89
Y-Connection
10 13 16 20 23 26 29 32 39 45
90° Elbow
5 7 9 11 12 14 16 18 21 25
45° Elbow
3 4 4 5 6 7 8 9 10 13
Location of the termination of the venting system
should comply with the National Fuel Gas Code,
ANSI Z223.1, manufacturer’s recommendations
and/or applicable local codes. See Diagram for
typical terminal locations.
A. The exit termination of a mechanical draft system
must not be less than 7’ above grade when
located adjacent to a public walkway.*
B. The venting systems, with the exception of direct
vent appliances, must terminate at least 4’ below,
4’ horizontally, or 1’ above any door, window or
gravity air inlet into the building.
C. A venting system must terminate at least 3’ above
any forced air inlet located within 10’.
D. The bottom of the vent terminal must be located
at least 1’ above finished grade.**
E. The vent termination should not be mounted
directly above or within 3’ horizontally from an oil
tank vent or gas meter (not shown in image).
F. The vent termination point must not be installed
closer than 3’ from an inside corner of an
L-shaped structure.
• Oil motor and fan shaft with
SWG Super Lube annually
• Works in conditions of -40°
to 300° (F)
• Synthetic lubricant which maintains
specified viscosity
• Use of any other lubricant may
cause premature failure
SWG Super Lube