Specification

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Venting
Gas and oil heating appliances generate heat through
the combustion of fuel. The heat is transferred through
the heat exchanger and distributed to the conditioned
space. The products of combustion, however, must be
vented safely out of the structure. In a conventional
chimney, venting is achieved by the natural lifting action
of the hot combustion gas. New, efficient systems
absorb more of the heat in the heat exchanger
and produce lower temperature vent gas. Lower
temperature gas does not rise as quickly or as
reliably as in older, less efficient systems. Power
venting or sidewall venting is more economical
and safer than chimney venting. A power venter
uses a motorized blower to vent the products of
combustion. A power venter is interlocked with the
appliance to ensure that proper draft is achieved
before the appliance burner is activated.
The SWG or ComboVent™ Power Venter
is the safest, most efficient power venter
available today.
Patented SWG or ComboVent Power Venters are ETL
and cETL listed for all LP gas, natural gas, or oil-
fired heating equipment. The SWG or ComboVent
combines the motor, blower, and vent hood in one
complete, easy to install unit. The SWG mounts on
the outside of the building and pulls the combustion
gases from the appliance through the outside wall
utilizing 100% negative pressure.
Benefits of the SWG or ComboVent Power
Venter include:
• 100% negative pressure in the vent pipe for
maximum safety.
• Standard galvanized pipe can be used instead of
expensive stainless steel.
• No need to seal vent pipe joints, saving time
and money.
• Significantly longer vent lengths than positive
pressure, direct vent systems.
• The SWG or ComboVent is recommended by
major heating appliance manufacturers.
The SWG or ComboVent must be sized to match the
appliance or appliances’ input firing rate. Most firing
rates are published in the manufacturer’s installation
manual. The SWG and ComboVent must be installed
with a CK Control Kit to ensure proper listing and
safe, efficient venting.
How the SWG/CV Works
1. The thermostat calls for heat, energizing the Power
Venter (A).
2. A negative pressure is created, closing the pressure
switch on the control kit (B).
3. The burner (C) is activated and combustion gases
are exhausted (D).
4. After the thermostat is satisfied, the burner shuts
down and the venter continues to post purge,
exhausting residual flue gases.
5. When the timer or temperature control is satisfied,
the venter is deactivated.
Replacement Motor Kit and Stainless Steel
Blowerwheel shown.
Note: ComboVent and SWG-4HD, 5 & 6 Motor Kits include a stainless steel
blower wheel for better performance and extended life.
Power Vente
r
Supplemental
air through
Draft Control
The Power Venter pulls combustion gases to the outside,
creating 100% negative pressure in the vent pipe.
A
D
B
C
Outdoor Mounted Power Venters for Oil & Gas
SWG/CV Power Venter