Specifications

10
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
Determine offset distance of your chimney arrangement
from centerline of replace to centerline of chimney
where it is to pass through ceiling.
Locate center point of the chimney on ceiling as though
a straight up chimney arrangement is to be used. Mea-
sure your offset dimension from straight up chimney
center point on ceiling.
Ceiling Chimney Hole/
Possible Obstructions
The size of the hole in ceiling will vary with the angle at
which the chimney passes through ceiling.
Drive a nail up through ceiling at marked chimney cen-
ter point. Go to oor above and see where hole will be
cut. Check to see where existing ceiling joists and other
possible obstructions are located...i.e. wiring, plumbing
etc... If necessary, re-position chimney and/or replace
to avoid obstructions.
FPC556a
BFC36
LOCATE CENTER LINE
Circulating model
8/21/00 djt
86M"
(222mm)
Chimney Centerline
Actual Center-
point
Plumb Line
Plumb Bob
Imaginary Center-
point
FPC556a
Fig. 8 Locate centerline of chimney with plumb line.
New
Framing
Members
Existing
Ceiling
Joists
Fig. 9 Typical frame for ceiling chimney hole.
FP551b
17 1/2"
Framing chimney hole
5/13/99 djt
Ceiling
Chimney
Hole
17Z\x”
(445mm)
17Z\x”
(445mm)
FP551b
Fig. 10 Ceiling chimney hole sizes necessary for installing
restop spacer.
Cutting the Hole
Cover replace collar opening and cut proper sized
chimney hole in chimney.
Framing the Ceiling Hole
Frame the ceiling chimney hole as shown in Figure 9. It
is good practice to use framing lumber that is the same
size as the ceiling joists; this is a requirement at attic
level.
The following table gives restop spacer model num-
bers:
Chimney Hole Size
Angle of Chimney
at Ceiling
Size of Chimney Vertical 30°
FS2A FS6A
8” Flue 17Z\x” x 17Z\x” 17M\₈” x 29⁵\₈”
(445 x 445mm) (454 x 753mm)
The inside dimension of the frame must be the same
as the hole size selected from Figure 10 in order to
provide required the 2” (51mm) air space between the
outside diameter of the chimney and the edges of the
framed ceiling hole.