Specification

6
SWG
Power Venter
(Clearance to Combustibles)
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 breaching 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%.
* With galvanized sheet metal liner or equivalent
Single Pipe System
Double Pipe System
Extension Kits
Diagram A
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
Power
Venter
Model
Extension
Kit Model
SWG-4HD PEK-4
SWG-4HDS PEK-4
SWG-5 PEK-5
SWG-5S PEK-5
SWG-6 PEK-6
SWG-6S PEK-6
SWG-8 PEK-8
Allowable Inlet
Temperature
Clearance
(B)
400ºF or Less 3" min.
550ºF or Less 4" min.
550ºF or Less 3" min.*
Allowable Inlet
Temperature
Clearance
(A)
400ºF or Less .5" min.
550ºF or Less 1" min.
550ºF or Less .5" min.*
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.