Through The Fireplace; Wall Pass-Throughs; Through The Fireplace Installation; An Approved Wall Pass-Through For The United States - Vermont Castings 1975 Owner's Manual

Defiant FlexBurn 1975 Non-Catalytic / Catalytic Wood Burning Stove
® ®

Through the Fireplace

If your fireplace opening height is at least 29" (737 mm), you
may install a Defiant through the opening using a "positive
®
connection" kit, available from your local dealer. Positive
connection kits ensure a tight fit between the stove flue collar
and the chimney flue. (Figure 9)
Fireplace installations, whether connected to the flue above
or through the fireplace opening, have special clearance
requirements to adjacent trim and the mantel. You'll find the
required safe clearances for Defiant
on Page 13.
Floor protection requirements also apply to fireplace
installations. This information is on Page 11.
Flexible
Connector
Mantel Shield
Fireplace Adapter Kit
"Positive Connection"
Figure 9 - Through the fireplace installation.

Wall Pass-Throughs

Whenever possible, design your installation so the connector
does not pass through a combustible wall. If you are
considering a wall pass-through in your installation, check
with your building inspector before you begin. Also, check
with the chimney connector manufacturer for any specific
requirements.
Accessories are available for use as wall pass-throughs. If
using one of these, make sure it has been tested and listed
for use as a wall pass-through.
In the United States, the National Fire Protection Association
(NFPA) has established guidelines for passing chimney
connectors through combustible walls. Many building
code inspectors follow these guidelines when approving
installations.
9
fireplace installations
®
ST245
fireplace
flex connector
12/99
Vermont Castings • Defiant Flexburn Installation & Operating Manual_R32 • 04/17
Figure 10 shows one NFPA recommended method. All
combustible material in the wall is cut away from the
single-wall connector to provide the required 12" (305 mm)
clearance. Any material used to close up the opening must
be noncombustible.
Wall Stud
Chimney
Connector
D E
F IA N
Floor
Protection
Figure 10 - An approved wall pass-through for the United States.
Three other methods are also approved by the NFPA:
•
Placing a section of chimney connector inside a
ventilated thimble, which in turn is separated from
combustibles by 6" (152 mm) of fiberglass insulating ST493
material. Brick pass thru
11/00
•
Placing a section of chimney connector inside a section
of 9" (230 mm) diameter, solid-insulated, factory-built
chimney, with 2" (51 mm) of air space between the
chimney section and combustibles.
•
Using a section of solid-insulated double-wall high
temperature chimney, with an inside diameter the same
as the chimney connector, at least one inch of solid
insulation, and a minimum of 9" (229 mm) air space
between the outer wall of the chimney section and
combustibles.
In Canada, The Canadian Standards Association has
established different guidelines for wall pass-throughs. Figure
11 shows one method, in which all combustible material in
the wall is cut away to provide the required 18" (457 mm)
clearance for the connector. The resulting space must remain
empty. A flush-mounted sheet metal cover may be used on
one side only. If covers must be used on both sides, each
cover must be mounted on noncombustible spacers at least
1" (25 mm) clear of the wall.
12" of Noncombustible
Material
3-90-30005220