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Date Printed: 4/28/11
File: G:/pubdata/Manuals\english manuals\OM-KE/PE.pub
OM KE/PE 1006
Version 1.11 Revised: DApril 2011
Installation – General Instructions
4.
A chimney must be the required height above the roof or other obstruction for safety and for proper draft operation.
The requirement is that the chimney must be at least 3 feet higher than the highest point where it passes through the
roof and at least 2 feet higher than the highest part of the roof or structure that is within 10 feet of the chimney,
measured horizontally (Fig. 12).
THIMBLE
A thimble must be used when the connection from the stove is made
through a combustible wall to a masonry chimney. There are several
methods to use for connection through a combustible wall, two of which
are illustrated in this manual. Local building authorities may be consulted
or NFPA 211 may be used for additional methods of chimney connection.
Also, listed prefabricated metal thimbles may be purchased for use with
wood stoves. The manufacturer's installation instructions for the thimbles
must be strictly followed to assure the safety of the system. Be sure to
maintain the designated clearance to combustible materials.
Brick Chimney Thimble Assembly
Construction of the brick thimble assembly requires 12 inches of
brick around a fire clay liner. Be sure the point of penetration
allows an 18 inch clearance from the connector to the ceiling. An
appropriate opening for a chimney connector must be cut in the
wall to maintain the required 12 inches of brick separation from
combustibles. It will be necessary to cut wall studs and install a
header and sill frame to maintain proper dimensions and to hold
the weight of the brick (Fig. 13). NOTE: Whenever cutting through
a wall, check first with local building authorities to be sure building
integrity is maintained. Minimum 3 1/2-inch (4-inch nominal) thick
solid bricks are to be used. The fire clay liner (ASTM C35 or
equivalent), minimum 5/8 inch wall thickness, must not penetrate
into the chimney beyond the inner surface of the chimney flue liner
and must be firmly cemented in place. If it is necessary to cut a
hole in the chimney liner, use extreme care to keep it from
shattering. Refractory mortar must be used at the junction to the
chimney liner (Fig. 14). After the assembly is complete, insert the
chimney connector in the fire clay liner. Do not push it beyond the
inside edge of the chimney liner because this will affect the draw of
the chimney.
Fig. 11 Clearances—Masonry To Combustibles
Fig. 12 Minimum Chimney Height
12"
Fig. 13 Brick Chimney Thimble