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8 USSC
PART E - (Figure 5)
In addition to the methods shown by A, B, C, and D of Figure 5, a listed factory-built wall pass-through system may
be purchased and installed according to the instructions packaged with it to provide a safe method of passing
chimney connector through a combustible wall for a connection to a masonry chimney.
If the chimney connector does not have to pass through a combustible wall to get to a masonry chimney, simply connect
the chimney connector directly to the masonry chimney's chimney thimble as described and shown by parts C and D of
Figure 5. Remember, the chimney connector should extend into the chimney thimble to the innerface of the chimney flue
but not beyond; if the chimnney connector is extended through the chimney thimble into the chimney flue, resistance to the
flow of smoke and gases up the chimney will occur; that flow resistance will have an adverse affect on the operation and
performance of the heater and venting system.
MINIMUM CHIMNEY CLEARANCES FROM MASONRY TO
SHEET STEEL SUPPORTS AND COMBUSTIBLES 2 IN.
CHIMNEY LENGHT
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 LENGHT
USE CHIMNEY MFRS. PARTS TO
ATTACH CONNECTOR SECURELY
AIR SPACE
PART B
FIGURE 5 -
(FIGURE 5 CONTIN-
UED)
AIR SPACE
9 IN. MINIMUM
FACTORY-BUILT
CHIMNEY LENGHT
SHEET STEEL SUPPORTS
CHIMNEY SECTION
CHIMNEY
CONNECTOR
AIR SPACE
2 IN.
TWO VENTILATED AIR
CHANNELS EACH 1 INCH.
CONSTRUCED OF
SHEET STEEL.
PART C
FIGURE 5
PART D
FIGURE 5
MINIMUM CLEARANCE
2 IN. ALL AROUND
CHIMNEY THIMBLE
1 IN. AIR SPACE TO
CHIMNEY LENGHT
MASONRY CHIMNEY CONSTRUCTED
TO NFPA 211
SHEET STEEL SUPPORTS
(24 GAUGE MIN. THICKNESS)
CHIMNEY CONNECTOR
TO HEATER
CHIMNEY FLUE
SOLID INSULATED, LISTED
FACTORY-BUILT CHIMNEY
LENGHT (12 IN. LONG MIN.)
MINIMUM CHIMNEY CLEARANCES FROM MASONRY TO
SHEET STEEL SUPPORTS AND COMBUSTIBLES 2 IN.
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
CONNECTION OF CHIMNEY CONNECTOR TO A MASONRY CHIMNEY WHEN CHINEY CONNECTOR
DOES NOT PASS THROUGH A COMBUSTIBLE WALL