Vermont Castings Defiant FlexBurn Homeowner's Installation And Operating Manual page 12

Defiant ® FlexBurn ™ 1975 Non-Catalytic / Catalytic Woodburning Stove
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When the wall has a heat shield mounted on it.
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When the wall and stove pipe have heat shields.
In general, the greatest clearance is required when you
place a stove and its connector near a wall with no heat
shield.
For example, when the Defiant is installed parallel to the
rear wall and no connector shield is used, it must be at
least 15" (381 mm) from the wall behind it and at least
21" (533 mm) from walls on either side. These dimen-
sions are measured from the top edge of the stove to the
combustible wall.
If the Defiant is installed in a corner and no shield is used,
the corners of the stove top must be at least 5" (127 mm)
from nearby walls.
Clearances may be reduced only by means approved by
the regulatory authority, and in accordance with the clear-
ances listed in this manual. Refer to Page 14 for approved
clearance reduction specifications.
NoTe: A minimum ceiling height of 8' (2.4 m) is required
for all installations of the Defiant.
NoTe: installation of the Defiant is not permitted in
alcoves.
wall Shields
One way to reduce clearances is with a wall shield con-
structed of 24 gauge or heavier sheet metal, or of another
noncombustible material such as 1/2" (13 mm) insulation
board such as Durock or Wonderboard
®
"laid on flat," with the 3¹\₂" (90 mm) side down.
Shields must be spaced out from the combustible surface
1" (25 mm) on noncombustible spacers, as in Figure 13.
The spacers should not be directly behind the stove or
chimney connector.
Air must be able to flow between the wall and the shield.
At least 50% of the bottom 1" (25 mm) of the shield must
be open, and the shield must be open at the top. Metal
screening across the top will keep small stray objects from
being trapped behind the shield. (Fig. 13)
The shield must be a minimum of 48" (1219 mm) tall, and
must extend at least 19" (483 mm) higher than the top
of the stove, whichever is higher. The shield behind the
chimney connector must be 30" (760 mm) wide, centered
behind the pipe; for installations that use an approved
prefabricated chimney to pass through the ceiling, the
shield behind the chimney connector must stop 1" (25 mm)
below the ceiling.
With 8" connections and chimneys, because of potentially
higher pipe temperatures, the shield must extend the full
height of the wall (up to 9' (2.7 m)) and stop 1" (25 mm)
below the ceiling.
12
Fig. 13 Approved wall shield construction.
A fireplace installation requires special clearance between
the side of the stove and the right and left walls, between
the side of the stove and the decorative side trim on the
fireplace face, and between the top of the stove and the
mantel.
N o n c o m b u s t i b l e s h i e l d s
installed 1" (25 mm) away from
, or common brick
the combustible surface on
®
noncombustible spacers, called
ventilated shields, may be used
to reduce clearances.
To protect a mantel from the
heat of a stove in a fireplace
installation, use a custom-made
ventilated mantel shield that is
at least 48" (1220 mm) long,
centered over the stove. (Fig.
14) Ventilated shields for side
trim must extend the full length
of the trim.
An unprotected mantel ("A", Fig. 15) cannot be more than
9" (230 mm) deep and must have a minimum clearance of
41" (1041 mm), measured from the stove's top plate. With
a ventilated shield, this clearance may be reduced safely
to 29" (737 mm).
Unprotected top trim (B) protruding 3/4" (19 mm) or less
from the face of the fireplace must be a minimum of 28"
(711 mm) from the stove's top surface. With a ventilated
trim shield, this clearance may be reduced safely to 21"
(533 mm).
Unprotected side trim (C) that protrudes 3/4" (19 mm) or
less from the face of a fireplace must have a minimum
clearance of 14" (356 mm), measured from the stove's top
Air Flow
Screen
Wall Shield
Stud Wall
Framing
Noncombustible
Spacers and
Fasteners
Drywall
Air Flow
ST248
Fireplace and Mantel Trim Shields
wall shield construction
12/14/99 djt
Shield
Metal Spacer
ST248
1" (25mm)
1/4" (6mm)
ST501
Fig. 14 A custom-formed
mantel shield.
ST501
mantel and
trim shield
11/10/00 djt
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