4
INSTALLATION INSTRUCTIONS
FOR CONVERTING A CLASS-A
METAL CHIMNEY OR MASONRY
CHIMNEY TO A DIRECT VENT
SYSTEM
These instructions apply to the DuraVent
Direct Vent Conversion Kits for factory-
built Class A metal chimneys and masonry
chimneys. These venting systems, in
combination with the gas appliance, have
been tested and listed by a major testing
agency such as UL, AGA, Omni or Warnock
Hersey. Check the manufacturer’s rating
plate and instruction manual to confirm that
a DuraVent Direct Vent Chimney Conversion
system is approved for use on the brand
name appliance you have selected.
IMPORTANT
Read all instructions carefully before starting
the installation. Failure to follow these
instructions may create a fire or other safety
hazard, and will void the warranty. Be sure
to check the appliance manufacturer’s
installation instructions for specific venting
and clearance to combustible requirements,
which may vary from one appliance to
another.
INSTALLATION PRECAUTIONS
The DuraVent Direct Vent System is an
engineered product that has been designed
and tested for use with an approved list of
direct vent gas appliances. The DuraVent
warranty will be voided, and serious fire,
health, or other safety hazards may result
from any of the following actions:
• Installation of any damaged Direct Vent
component.
• Unauthorized modification of the Direct
Vent System
• Installation of any component part not
manufactured or approved by DuraVent.
• Installation other than as instructed by
DuraVent and the appliance manufacturer.
Consult your local building codes before
beginning the installation.
Have the existing installation inspected by
a qualified chimney sweep or professional
installer, prior to converting to direct vent.
The existing chimney system must be in
serviceable condition, and functionally
sound. The direct vent conversion described
herein applies only to factory-built metal
ceiling-supported type systems and masonry
through-the-wall type systems. Note: You
cannot install a Conversion Kit in a through-
the-wall type factory-built metal chimney.
GENERAL
Two different types of direct vent conversion
systems are described here. One is through
an existing factory built metal chimney going
through the ceiling. The other is through the
wall of an existing masonry chimney. Follow
the appropriate directions for your situation.
A typical direct vent conversion of a factory
built metal chimney is shown in Figure 1.
The concept of direct vent conversion is
to connect an adapter to an Underwriters
Laboratories listed 4-inch diameter aluminum
flex pipe (DuraVent’s DuraFlex is an example
of an UL listed flex pipe). This is then passed
this down through the center of the existing
metal chimney system. Three sizes of Top
Adapters are available which should fit
most sizes and makes of metal chimney
systems. The Retro Connector (909B) is then
attached to the bottom of the flex pipe. Both
the Top Adapter, and the Retro Connector
are attached to the existing chimney with
sheet metal screws. The appliance is then
connected to the chimney with appropriate
black direct vent pipe, and an adjustable
length section.
A typical conversion of an existing masonry
chimney is shown in Figure 6. For installation
through the wall of an existing masonry
Summary of Contents for DirectVent Pro
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