Installation
4
DuraVent Flexible Chimney Liners are
intended to service residential heating
appliances burning wood, wood pellets, oil
fuel, natural gas or propane gas (Category I or
draft-hood equipped appliances), or
other appliances listed for use with Type B gas
vents. DuraVent Liners should not be used to
vent unlisted gas or oil appliances, unlisted
wood or coal burning appliances, Category II,
III and IV Gas appliances (unless specically
listed to UL 1738 or ULC-S636 in Canada) or
gas appliances listed for use only with Type
BW vent.
Every vent system must be properly planned
and installed for optimum performance and
safety. Refer to the appliance manufacturer’s
instructions to determine venting requirements
and limitations with respect to installation and
use of the appliance.
Permits may
be required before commencement of the
installation. These products must be installed
in accordance with local building code
requirements.
are made from
highly corrosion-resistant stainless steel
alloys. It is common, however, for indoor air
to contain chlorides given off from carpeting,
paints, paint thinners and laundry detergents.
When combustion air for the heating appliance
is drawn from the house, these contaminants
can combine with ue gas condensates to form
aggressive chemicals, such as hydrochloric
acid that can attack and degrade connector
pipes and chimney liners. Since it is difcult
to determine if contaminants are present,
the venting system should be designed to
minimize the potential for condensation
(i.e. insulate the liner and use B vent type
double wall connectors) and to supply outside
combustion air directly to the appliance. Refer
to the appliance manufacturer's instructions
and local codes for methods of providing
outside air.
Inspect the masonry chimney for proper
construction and compliance with applicable
building codes, authorities having jurisdiction
should be consulted before installation to
determine the need to obtain a permit. The
chimney must meet the following minimum
requirements before lining or relining it with