10
8390-975
Vermont Castings • Defiant® Model 1975-CAT-C Installation Manual_R8 • 02/21
Figure 2.7
- Through the fireplace installation.
Figure 2.8
- An approved wall pass-through for the United States.
Figure 2.9
- An approved wall pass-through for Canada.
Your local dealer or your local building inspector can provide
details for other approved methods of passing a chimney
connector through a combustible wall in your area. In Canada,
this type of installation must conform to CAN/CSA-B365,
Installation Code for Solid Fuel Burning Appliances and
Equipment.
NOTE:
Do not vent your appliance into a factory-built (zero-
clearance) fireplace. These appliances and their chimneys
are specifically designed as a unit for use as fireplaces. It
may void the listing or be hazardous to adapt them for any
other use.
DO NOT CONNECT THIS APPLIANCE TO ANY AIR
DISTRIBUTION DUCT OR SYSTEM.
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
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
2.9 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.
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.
Figure 2.8 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.
ST245
fireplace
flex connector
12/99
Flexible
Connector
Mantel Shield
Fireplace Adapter Kit
"Positive Connection"
ST493
Brick pass thru
11/00
Wall Stud
Chimney
Connector
Floor
Protection
12" of Noncombustible
Material
T
ST494
steel
wall pass thru
11/00
18" (460mm) clearance
between pipe and sides/top/
bottom of opening
