Specification

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Venting
If mounting the venting system near combustible materials, refer to Diagram A for allowable installation
clearances. Clearances are based on an installation using single wall galvanized steel vent pipe. If manufactured
double wall vent pipe is required or used for the installation, clearance should be based on the vent pipe’s rated
clearance. Always check local code requirements for code restrictions.
Routing of the vent system and clearances for the vent
pipe may be planned once the termination location is
determined. Route the vent pipe from the appliance to
the venter using as few elbows as possible. The horizontal
section of the vent pipe should have a slight upward
slope from the appliance to the venter. The vent pipe
size (diameter) can be smaller than a typical chimney
vented system and still overcome the higher pressure
losses because the power venter mechanically creates the
required draft or air flow to vent the system.
For estimating the minimum vent pipe diameter for a gas
system, divide the BTU/hr. input of the heating equipment
by 12,600 BTU/sq. in. For oil systems, multiply GPH by
140,000 BTU/GAL, then divide by 12,600 BTU/sq. in.
This will give the minimum cross sectional area required.
(See Table 4 for area to diameter conversion.) For multiple
equipment venting systems, divide the total BTU/hr. input
for all appliances by 9,300 BTU/sq. in. This will give you
the minimum vent pipe diameter needed for the common
breach of the vent system.
As a rule of thumb, size the
vent pipe to the outlet diameter
of the heating equipment for
a single appliance venting
system. For multiple appliance
venting systems, use the outlet
diameter of the largest unit
and add 50%.
SQUARE HOLE
THROUGH WALL
COMBUSTIBLE
MATERIAL
METAL LINING FOR
550°F-400°F INPUT TEMP.
FLOOR JOIST
B-VENT
INPUT TEMP.
LOCATION
ELBOW
A
A
A
B
B
B
COMBUSTIBLE
MATERIAL
FLOOR JOIST
FLOOR
OUTER PIPE
EXTENSION
END PIPE COVER
SWG SERIES
POWER VENTER
BLOCK
FOUNDATION
FROM SWG UNIT
B-VENT or
L-VENT
ELBOW
INPUT TEMP.
LOCATION
A
B
Extension Kits
Power Venter
Model
Extension Kit
Model
Maximum Wall
Thickness
SWG-4HD
PEK-4 12"
SWG-4HDS
PEK-4 12"
SWG-5
PEK-5 16"
SWG-5S
PEK-5 16"
SWG-6
PEK-6 16"
SWG-6S
PEK-6 16"
SWG-8
PEK-8 16"
The standard SWG Power Venter is designed for walls up to 8" thick.
PEK extension kits allow the SWG to be installed in walls up to 16"
thick.* The PEK kit includes the inner/outer pipe extension, air flow
damper, and one foot of
1
⁄4" aluminum tubing. It is available for
models SWG-4HD through SWG-8.
* PEK-4 allows the SWG to be
installed in walls up to 12" thick.
Pipe Size
Nominal Cross-
Sectional Area
Sq. Inches
3" 7
4" 13
5" 20
6" 28
7" 38
8" 50
9" 64
10" 79
12" 113
14" 154
Table 4
Clearance to Combustibles
SWG/CV Power Venter
* With galvanized sheet metal liner or equivalent
Diagram A
Single Pipe System Double Pipe System
Allowable Inlet
Temperature
Clearance (B)
Allowable Inlet
Temperature
Clearance (A)
400ºF or Less 3" min. 400ºF or Less .5" min.
550ºF or Less 4" min. 550ºF or Less 1" min.
550ºF or Less 3" min.* 550ºF or Less .5" min.*