Heat & Glo EVEREST EVEREST Installer's Manual page 17

To install firestops for horizontal runs that pass through
either interior or exterior walls:
• Cut a 12-inch by 10-inch (305mm X 254mm) hole through
the wall. The center of the hole is one (1) inch (25.4mm)
above the center of the horizontal vent pipe.
• Position the firestops on both sides of the hole previ-
ously cut and secure the firestops with nails or screws.
• The pipe opening of the firestops MUST be placed to-
wards the bottom of the fireplace.
NOTE: There must be NO INSULATION or other
combustibles inside the framed firestop opening.
INTERIOR
WALL SHIELD
Figure 13. 10" x 12" Hole and Vent Pipe
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 a 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.
If the area above the ceiling is NOT an attic, position and
secure the ceiling firestop on the ceiling side of the previously
10"
cut and framed hole.
This shows a ceiling installation.
12"
CEILING
If the area above the ceiling IS an attic, position and secure
the firestop on top of the previously framed hole.
This shows an attic installation. Keep insulation away from
the vent pipe at least 1 inch (25mm).
Heat & Glo • Everest • 750-900 Rev. L • 1/06
10" (254 mm)
NEW
FRAMING
MEMBERS
CEILING
Figure 14. 10" x 10" Hole & New Framing Members
NAILS (4 REQUIRED)
Figure 15. Ceiling Firestop (Ceiling Side)
CEILING
CEILING FIRESTOP
Figure 16. Attic Firestop
10" (254mm)
CHIMNEY
HOLE
EXISTING CEILING
JOISTS
JOIST
CEILING FIRESTOP
NAILS (4 REQUIRED)
RAFTER
17