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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
8
Step 8. Fireplace should be secured to side
framing members using the full length nailing
tabs at the top and bottom of the fireplace front
face. Use 8d nails (
Figure 18
).
Figure 18
Note: The nailing tabs and the area directly
behind the nailing tabs are exempt from the
clearances described on page 5. Maintain at
least 1/2" clearance from the firebox wrapper to
the framing at the closest point of contact,
directly adjacent to the flange.
Figure 19
8d Nail
Step 3. Position appropriate firestop spacer at
ceiling and nail temporarily with two (2) 8d
nails. If chimney penetrates ceiling vertically,
use flat firestop spacer, Model F8FS-2 for FTF8
system and Model F10FS-2 for the FTF10
system*. If chimney penetrates ceiling at 30°
angle (offset chimney), use 30° firestop spacer,
Model F8FS30-2 for FTF8 and Model F10FS30-
2 for FTF10 system*. Use one nail on opposite
sides to hold firestop spacer in position. Nail
permanently, using at least two (2) more 8d
nails, after chimney sections have been as-
sembled through the firestop spacer and after
any necessary adjustments have been made.
Firestop spacer must be secured by at least
four (4) 8d nails when completely installed.
Note: If there is a room above ceiling level,
firestop spacer must be installed on the bottom
side of the ceiling. If an attic is above ceiling
level, firestop spacer must be installed on top
side of ceiling joist (Figures 20 and 21 ).
Figure 20
Figure 21
Firestop Spacer
Room Above
Firestop Spacer
Attic Above
INSTALLING THE CHIMNEY SYSTEM
Step 1. Before continuing, check the operation
of the damper, as described on page 4, (
refer
to Figure 3
).
Step 2. Using standard construction framing
techniques, construct opening for chimney
route up through the ceiling(s) and roof or
through an outside chase.
Framing must maintain adequate minimum air
space clearance at all times.
CAUTION: ALLOW MINIMUM 2" (51 MM)
CHIMNEY AIR SPACE TO COMBUSTIBLE
FRAMING MEMBERS THROUGHOUT VERTI-
CAL OR OFFSET CHIMNEY INSTALLATION
(
SEE **NOTE
).
A minimum 2" (51 mm) air space must be
reserved for all combustible materials ex-
tending for any continuous length surround-
ing the chimney (
See **Note
).
Reference
Figures 15 and 16
and charts Fram-
ing Dimensions for Ceiling and Roof, which
specify minimum ceiling and roof dimensions.
To determine chimney center line in new con-
struction, use plumb line from roof or ceiling
above fireplace to center of flue collar on
fireplace.
For remodeling, plumb to center of flue collar
from ceiling above, drive nail through ceiling
from below to mark position, then mark and
cut to passage from above ceiling (around
nail) (
Figure 19
). Then plumb from ceiling or
roof level directly above hole which has just
been completed.
Step 6. Route the Class 0 air duct out the back
wall or side wall, up through the ceiling or floor
joists to an outside wall. The air duct should be
located above snow level.
Note: If the fireplace is installed against an
inside wall, the Class 0 air duct may be ex-
tended into a ventilated attic space at least 18"
(457 mm) above the attic floor. Secure the duct
hood to a vertical post with the inlet positioned
downward. Ensure nothing blocks the hood
opening. This air duct must never terminate
higher than the chimney.
Step 7. Cut or frame hole through the outside
wall for the installation of the duct inlet hood.
A 4 ¹⁄₄" (114 mm) diameter hole is sufficient.
Feed the loose end of the flexible air duct
through the hole cut for the inlet hood and
attach to collar on inlet hood using two (2)
screws. Insert hood into opening. Secure in
place with nails driven through holes in hood
flange. Seal with noncombustible waterproof
silicon type caulking. If additional air duct is
needed, use Class 0 metallic air duct.
*Note: Use Models F10FS or F10FS30 when
installing FTF10 chimney in the U.S. only.
** Note: 1" (25 mm) when installed with FTF10
in the U.S. only.
Plumb Line
Note: If installing the optional collar duct kit, it
should be installed after the chimney has been
attached to the flue collar.