15
!
•
Drill a hole or drive a nail through this center point.
•
Check the floor above for any obstructions, such as
wiring or plumbing runs.
•
Reposition the heater and flue system, if necessary,
to accommodate the ceiling joists and/or obstruc-
tions.
•
Cut an 11-inch X 11-inch (280 mm X 280 mm) hole
through the ceiling, using the center point previously
marked.
•
Frame the hole with framing lumber the same size
as the ceiling joists.
FIGURE 18. 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 19. 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 20. 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 section.
•
The termination kit should pass through the wall fir-
estops from the exterior of the building.
•
Adjust the termination cap to its final exterior posi-
tion 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.
JOIST
CEILING FIRESTOP
CEILING
NAILS (4 REQUIRED)
CEILING
CEILING FIRESTOP
RAFTER
NAILS (4 REQUIRED)
CEILING
NEW
FRAMING
MEMBERS
EXISTING CEILING
JOISTS
CHIMNEY
HOLE
11" (280 mm)
11" (280mm)