10
In the U.S.
The National Fire Protection Association’s publication,
NFPA 211, Standard for Chimneys, Stoves, Vents and
Solid Fuel Burning Appliances permits four methods
for passing through a combustible wall. Before
proceeding with any method be sure to consult with
your local building officials to discuss any local code
requirements.
Common Method:
See
Fig 6.
Remove all combustible materials from the
pass-through area (around the chimney connector),
a minimum 12” (30.5 cm). A 6” (15.2 cm) diameter
connector will require a 31 1/4” x 31 1/4” (79.4 x 79.4
cm) square opening.
The opening must be filled with at least 12” (30.5
cm) of brick around a fireclay liner. The liner must
be ASTM C35 or equivalent, having a minimum wall
thickness of 5/8” (16 mm).
The Pass-through must be at least 18” (45.7 cm) from
combustible ceiling materials.
It will be necessary to cut wall studs, install headers,
and construct a sill frame to maintain the proper
dimensions and to support the weight of the brick.
The bricks must be solid brick with a minimum of 3
inches thick (nominal 4”/ 102 mm).
Refractory mortar must be used at the junction of the
chimney and the pass-through liner. The pass-through
liner must not penetrate the chimney liner beyond the
inner surface of the chimney liner. Use extreme care
when constructing the hole in the chimney liner as the
tiles can shatter easily.
Consult your local building inspector, authorized
Norsk Kleber Dealer, NFPA 211 in the U.S. or
CAN/CSA-B635 in Canada for other approved
wall pass-through methods.
In Canada
The installation must conform to CAN/CSA-B365,
Installation Code for Solid Fuel Burning Appliances
and Equipment. Before proceeding be sure to consult
your local building inspector.
Common Method:
This method requires the removal of all combustible
materials from at least 18” (45.7 cm) around the
chimney connector’s proposed location. A 6” round
liner requires a minimum opening 43 1/4” x 43 1/4”
(109.8 x 109.8 wcm) square.
Locate the pass-through at least 18” from combustible
ceiling materials. The space that is cleared of
combustible materials must remain empty. Sheet metal
panels can be used to cover the area. However, when
using a panel on both sides of the wall, each cover
must be installed on noncombustible spacers at least 1”
from the wall. If one panel of sheet metal is to be used
it may be installed flush to the wall.
See section 5.3.1 and 5.3.2 of CAN/CSA - B365-M91.
Clearance to Chimney
Wall
Flue Liner
Chimney
Wall
Sill/
Support
12”
2”
Fig 6
Chimney Connection
to Masonry Chimney
Summary of Contents for Kube 3
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