Vermont Castings Defiant FlexBurn Homeowner's Installation And Operating Manual page 9

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. (Fig. 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 fireplace installa-
tions on Page 13.
Floor protection requirements also apply to fireplace instal-
lations. This information is on Page 11.
Flexible
Connector
Mantel Shield
Fireplace Adapter Kit
"Positive Connection"
Fig. 9 Through the fireplace installation.
wall pass-Throughs
ST245
Whenever possible, design your installation so the connec-
fireplace
tor does not pass through a combustible wall. If you are
flex connector
considering a wall pass-through in your installation, check
12/99
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 Associa-
tion (NFPA) has established guidelines for passing chimney
connectors through combustible walls. Many building
code inspectors follow these guidelines when approving
installations.
30005220
Defiant FlexBurn 1975 Non-Catalytic / Catalytic Woodburning Stove
® ™
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.
Floor Protec-
tion
Fig. 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
material.
•
Placing a section of chimney connector inside a section
of 9" (230 mm) diameter, solid-insulated, factory-built
ST245
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 es-
tablished 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.
Wall Stud
Chimney
Connector
D E
F IA N
ST493
Brick pass thru
11/00
12" of
Noncombustible
Material
ST493
9