20
Figure 21 Hole and New Framing Members
If the area above the ceiling is
NOT
an attic, position
and secure the ceiling firestop on the ceiling side of
the previously cut and framed hole.
Figure 22 Ceiling Firestop (Ceiling Side)
If the area above the ceiling
IS
an attic, position and
secure the firestop on top of the previously framed
hole.
Figure 23 Attic Firestop
C. Flue Termination
For Horizontal Terminations -
To attach and secure
the termination to the last section of horizontal flue:
• Rotate and interlock the ends as described at the
beginning of the Installing Flue Components sec-
tion.
• The termination kit should pass through the wall
firestops from the exterior of the building.
• Adjust the termination cap to its final exterior po-
sition on the building.
WARNING: THE TERMINATION CAP
MUST BE POSITIONED SO THAT
THE ARROW IS POINTING UP.
• Use the exterior pipelock hole provided on the
round flange of the wall firestop to secure the flue
pipe in place.
• Use a high-temperature sealant or fiberglass rope
gasket to seal between the pipe and exterior
firestop.
• See Figure 4 for flue termination clearances.
Figure 24 Round Termination Cap
• Drill a hole or drive a nail through this centerpoint.
• Check the floor above for any obstructions, such
as wiring or plumbing runs.
• Reposition the heater and flue system, if neces-
sary, to accommodate the ceiling joists and/or
obstructions.
• Cut an 11-inch X 11-inch (280 mm X 280 mm)
for D-series or 10-inch x 10-inch (254mm x
254mm) for SL D-series pipe hole through the
ceiling, using the center point previously marked.
• Frame the hole with framing lumber the same
size as the ceiling joists.
!
CEILING
CEILING FIRESTOP
RAFTER
NAILS (4 REQUIRED)
CEILING
NEW
FRAMING
MEMBERS
EXISTING CEILING
JOISTS
CHIMNEY
HOLE
11" (280 mm) or
10" (254 mm)
11" (280mm) or
10" (254mm)
JOIST
CEILING FIRESTOP
CEILING
NAILS (4 REQUIRED)
9 1/2”
(241mm)
MINIMUM
2” (51mm)