Heat-N-Glo HV-CDN Installer's Manual page 17

For Vertical Runs - One ceiling firestop is REQUIRED at
the hole in each ceiling through which the vent passes.
To install firestops for vertical runs that pass through ceilings:
• Position a plumb bob directly over the center of the verti-
cal vent component.
• Mark the ceiling to establish the centerpoint of the vent.
• Drill a hole or drive a nail through this centerpoint.
• Check the floor above for any obstructions, such as wir-
ing or plumbing runs.
• Reposition the fireplace and vent system, if necessary,
to accommodate the ceiling joists and/or obstructions.
• Cut an 10-inch X 10-inch (254mm X 254mm) hole through
the ceiling, using the centerpoint previously marked.
• Frame the hole with framing lumber the same size as the
ceiling joists.
NOTE: There must be NO INSULATION or other
combustibles inside the framed firestop opening.
10" (254mm)
NEW
FRAMING
MEMBERS
CEILING
Figure 17. Hole & New Framing Members
10" (254mm)
CHIMNEY
HOLE
EXISTING CEILING
JOISTS
19
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.
CEILING
NAILS (4 REQUIRED)
Figure 18. 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.
NOTE: Keep insulation away from the vent pipe at least
1 inch (25mm).
CEILING
CEILING FIRESTOP
Figure 19. Attic Firestop
JOIST
CEILING FIRESTOP
NAILS (4 REQUIRED)
RAFTER