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Step 4. 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 screws, 8d nails or equivalent fas-
teners ( Figure 16 ). This manufactured home
model is also provided with floor brackets
used to secure the fireplace to the floor to
prevent shifting in transit.
Figure 16
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.
INSTALLING THE CHIMNEY SYSTEM
Step 1. Before continuing, check the operation
of the damper, as described on page 4, ( refer
to Figure 2 ).
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" CHIMNEY
AIR SPACE TO COMBUSTIBLE FRAMING
MEMBERS THROUGHOUT VERTICAL OR OFF-
SET CHIMNEY INSTALLATION.
A minimum 2" air space must be reserved for
all combustible materials extending for any
continuous length surrounding the chimney.
Reference Figures 14 and 15 and charts Fram-
ing Dimensions for Ceiling and Roof, which
specify minimum ceiling and roof dimensions.
8
In new construction, to determine chimney cen-
ter line, 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 17 ). Then plumb from ceiling or
roof level directly above hole which has just
been completed.
Screw, 8d Nail
Or Equivalent
Fastener
Figure 17
Step 3. Position appropriate thimble/firestop
spacer combination at ceiling and nail tempo-
rarily with two (2) 8d nails or equivalent fas-
teners ( see Figures 19, 20 and 21 ). Use one
fastener on opposite sides to hold thimble/
firestop spacer combination in position. Nail
permanently, using at least two (2) more fas-
teners, after chimney sections have been as-
sembled through the thimble/firestop spacer
combination and after any necessary adjust-
ments have been made. Firestop spacer must
be secured by at least four (4) fasteners 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 thimble must be installed on the bottom
side of ceiling joist (Figures 18 and 19 ).
Figure 18
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Room Above
Firestop Spacer
Attic Above
Firestop Thimble
Figure 19
Ensure the thimble penetrates the roof opening.
The thimble must extend completely through
the ceiling or roof cavity to the outermost plane
of the roof. Note: Thimble extensions (F8-
TE26) are available from your distributor for
constructions in which the distance between
the outside of the roof and the inside of the
ceiling exceeds 13". The thimbles and their
extensions provide for zero clearances to com-
bustibles and must be used at the ceiling/roof in
manufactured homes ( Figures 20 and 21 ).
Outer Pipe Of
Chimney
14" Min.
Thimble
FM8-AT2
Pitched Roof
Note: Trim Thimble/
Extension To Desired Length
And Pitch At The Rood Line
14" Min.
Thimble
Extension
F8-TE26
Thimble
FM8-AT2
Pitched Roof
Outer Pipe Of
14" Min.
Chimney
Thimble
FM8-AT2
Bow Roof
Figure 20
WARNING: DO NOT ALLOW INSULATING
MATERIALS TO BE BLOWN INTO THE
SPACE INSIDE THE THIMBLE AND THE
CHIMNEY. TO DO SO COULD RESULT IN
A FIRE HAZARD.
2"
Clearance
Minimum
Outer Pipe Of
Chimney
13"
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