United States Stove Company 1261 - Manual (Page 8)

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Part A: Use a minimum 3-1/2" thick brick masonry wall framed into the combustible wall. A fi reclay liner (ASTM C315 or equiva-
lent) having a 5/8" minimum wall thickness must be used and it must be at least 12" away from any material that could catch fi re.
Th
e inside diameter of the fi reclay liner shall be sized for the proper snug fi t of a 6" diameter chimney connector pipe. Th e fi reclay
liner shall run from the outer surface of the brick wall to, but not beyond, the inner surface of the chimney fl ue and shall be fi rmly
cemented in place. See Part A of Figure 8.
Part B: Use a solid insulated listed factory-built chimney length having an inside diameter of 6" and having 1" or more of solid in-
sulation. Th ere must be at least a 9" air space between the outer wall of the chimney length and any combustible materials. Th e
inner end of the chimney length shall be fl ush with the inside of the masonry chimney , the fl ue shall be sealed to the fl ue and to
the brick masonry penetration with nonwater-soluble refractory cement. Sheet steel supports which are at least 24 gauge(0.024")
in thickness shall be securely fastened to wall surfaces on all sides. Fasteners between supports and the chimney length shall not
penetrate the chimney liner. See Part B of Figure 8.
Part C: Use a 10" diameter ventilated thimble made of at least 24 gauge(0.024") steel having two 1" air channels. Th e ventilated thimble
must be separated from combustible materials by a minimum of 6" glass fi ber insulation. Th e opening in the combustible wall shall
be covered and the thimble supported with sheet steel supports which are at least 24 gauge (0.024") in thickness. Th e sheet steel
supports shall be securely fastened to wall surfaces on all sides and shall be sized to fi t and hold the chimney section. Fasteners
used to secure chimney sections shall not penetrate chimney fl ue liner. See Part C of Figure 8.
MINIMUM 12 IN.
TO COMBUSTIBLES
PART A, FIGURE 8
(FIGURE 8 CONTINUED ON NEXT PAGE)
CHIMNEY FLUE
MINIMUM CHIMNEY CLEARANCE TO
BRICK AND COMBUSTIBLES IS 2 IN.
MINIMUM CLEARANCES 12 IN.
OF BRICK ALL AROUND
CHIMNEY CONNECTOR
TO HEATER
FIRE CLAY LINER
(5/8" MIN. WALL THICKNESS)
MIN. 3-1/2" THICK BRICK
MASONRY WALL
MASONRY CHIMNEY
CONSTRUCTED TO
NFPA 211
PART B
FIGURE 8 -
(FIGURE 8 CONTINUED)
AIR SPACE
9 IN. MINIMUM
FACTORY-BUILT
CHIMNEY LENGTH
MINIMUM CHIMNEY CLEARANCES FROM MASONRY TO
SHEET STEEL SUPPORTS AND COMBUSTIBLES 2 IN.
CHIMNEY LENGTH
FLUSH WITH INSIDE
OF FLUE
NONSOLUBLE
REFACTORY
CEMENT
MASONRY CHIMNEY CONSTRUCTED
TO NFPA 211
CHIMNEY CONNECTOR
TO HEATER
MINIMUM CLEARANCE
9 IN. ALL AROUND
SHEET STEEL SUPPORTS
(24 GAUGE MIN. THICKNESS)
CHIMNEY FLUE
SOLID INSULATED, LISTED
FACTORY-BUILT CHIMNEY LENGTH
USE CHIMNEY MFRS. PARTS TO
ATTACH CONNECTOR SECURELY
AIR SPACE
TWO VENTILATED AIR
CHANNELS EACH 1 INCH.
CONSTRUCTED OF
SHEET STEEL.
PART C
FIGURE 8
MASONRY CHIMNEY CONSTRUCTED
TO NFPA 211
SHEET STEEL SUPPORTS
(24 GAUGE MIN. THICKNESS)
CHIMNEY CONNECTOR
TO HEATER
MINIMUM CHIMNEY CLEARANCES FROM MASONRY TO
SHEET STEEL SUPPORTS AND COMBUSTIBLES 2 IN.
MINIMUM 6 IN. GLASS
FIBER INSULATION ALL AROUND
24 GAUGE
VENTILATED THIMBLE WITH
TWO 1 INCH AIR CHANNELS
CHIMNEY THIMBLE
CHIMNEY FLUE