19
08/22
7021-801F
F. Masonry
G. Alternate Masonry
Figure 19.3
Non-combustible Hearth Pad
Airtight
Clean-out Door
Clean-out cover
Sheathing
3 in. (76mm)
minimum
1 in. (25mm)
clearance
Flashing
Fireclay flue
liner with airspace
Concrete Cap
1 in. (25mm) clearance
with firestop
6 in. (152mm)
minimum
Figure 19.4
Non-combustible
Hearth Pad
Airtight clean-out door
Sheathing
2 in. (51mm) minimum
Flashing
1 in. (25mm) clearance
1 in. (25mm) clearance
with firestop
6 in. (152mm) minimum
Fireclay Flue Liner
with airspace
Concrete Cap
Fire Risk.
Inspection of Chimney:
• Masonry chimney must be in good condition.
• Meets minimum standard of NFPA 211
•
Factory-built chimney must be a minimum
6 inch (152mm) UL103 HT.
WARNING
E. Interior - Rear Vent
Figure 19.1
Non-combustible Hearth Pad
Wall Thimble
12 in
[305 mm]
Minimum
6 in
[152mm]
Min
3 to 3 in
[76 to 76 mm]
Top Vent Kit
6 in
[152mm]
Min
60 in
[1524 mm]
Recommended
Figure 19.2
Non-combustible Hearth Pad
Wall Thimble
12 in
[305 mm]
Minimum
2 in [51mm] min
6 in
[152mm]
Min
Clean-out Tee
60 in
[1524 mm]
Recommended
