12
Vermont Castings Vigilant
®
2000898
An unprotected mantel must have a minimum clearance of
36”, measured from the stove’s top plate; with a ventilated
shield the clearance may safely be reduced to 18”.
Unprotected top trim must be a minimum of 36” from the
stove’s top surface; with a ventilated trim shield the clear-
ance may be safely reduced to 18”.
Unprotected side trim which protrudes 2” or more from the
face of the fireplace must have a minimum 36” of clearance,
measured from the stove’s top side edge; with a ventilated
trim shield, the clearance may be safely reduced to 18”.
Unprotected side trim which protrudes less than 2” from
the fireplace face must have a minimum clearance of 18”;
with a ventilated trim shield, this may be safely reduced
to 12”. (Fig. 15)
ST691
Vigilant
trim clearances
8/7/01 djt
C
C
A
B
Unprotected
protected
A. Mantel ....
36” (910mm)
18” (460mm)
B. Top Trim .
36” (910mm)
18” (460mm)
C. Side Trim
.......Over 2”
36” (910mm)
18” (460mm)
.....Under 2”
18” (460mm)
12” (300mm)
ST691
Fig. 15
Maintain clearances to combustible mantel compo-
nents.
wall pass-Throughs
Whenever possible, design your installation so that the
chimney connector does not pass through a combustible
wall. If you are considering a wall-pass through in your
installation, be sure you check with your building inspector
before you begin. Also check with the chimney connector
manufacturer for any specific requirements.
Accessories are available on the market which have been
tested and listed specifically for use as wall pass-throughs.
Use only these tested and listed accessories for wall pass-
throughs.
The National Fire Protection Association (NFPA) has estab-
lished guidelines for passing chimney connectors through
combustible walls. Many building code inspectors follow
these guidelines when approving installations.
The illustration below shows one NFPA recommended
method, in which all combustible material in the wall is cut
away from the single wall connector a sufficient distance
to provide the required 12” clearance for the connector.
Any material used to close up the opening must be non-
combustible.
DEFIA
N
T
ST493
Brick pass thru
11/00
Wall Stud
Chimney Con-
nector
Floor Pro-
tection
12”
Noncombustible
Naterial
ST493
Fig. 16
An approved wall pass-through method.
Three other methods are also approved by the NFPA.
•Using a section of double-wall chimney with a nine-inch
clearance to combustibles
•Placing a chimney connector pipe inside a ventilated
thimble, which is then separated from combustibles by six
inches of fiberglass insulating material
•Placing a chimney connector pipe inside a section of
eight-inch diameter solid insulated factory-built chimney,
with two inches of airspace between the chimney section
and combustibles.
Chimney Connectors
The chimney connector should be made of 24 gauge or
heavier sheetmetal. Galvanized chimney connector should
not be used, as it may release toxic fumes when exposed
to high temperatures.
The chimney connector should be as short and direct as
possible, with no more than two 90 degree turns.
Horizontal runs of chimney connectors should slope upward
1/4” per foot going from the stove toward the chimney. The
recommended maximum length of a horizontal run is 3 feet.
The total length of chimney connector should be no longer
than 8 feet to prevent the cooling of flue gases.
