FOCUS ST Owner's Manual
17
RSF Woodburning Fireplaces
If major repairs are required to meet the above conditions, a new chimney should be constructed.
To make the hole through the masonry chimney and make the connection to the fireplace, we recommend that you
follow these steps:
1. Sight-in and mark the outline of where the EXCEL chimney will penetrate the masonry chimney.
2. Using a large (¾" - 2")
masonry drill bit, drill a
hole exactly in the center
of the oval outline. With a
masonry hammer and drill,
slowly enlarge the hole to
the
size
required.
Remember to work from
the
center
out.
Be
especially careful with the
clay liner behind the brick
because three sides of it
must stay in place.
3. Bring the stainless-steel
liner down from the top of
the chimney.
If you are using a rigid liner
you will need enough room
to secure an elbow to it
with at least two screws or
rivets.
If it is difficult to install rigid stainless steel liner in the existing masonry chimney or for a masonry chimney with
less than 10"x10" inside, a listed stainless steel flexible liner can be used along with a flexible/rigid adaptor (LM-
8LAF) available from your RSF dealer.
4. Install the liner elbow and masonry adaptor on the lower end of the liner.
5. Move the fireplace forward enough to install the EXCEL chimney on the fireplace (elbow and length) then move
the fireplace back into position as you connect the masonry adaptor to the EXCEL chimney.
Using a New Masonry chimney
Since the masonry chimney is not build yet, we recommend that you position your fireplace, install the EXCEL
chimney on it and connect to the first length of liner before building the chimney as explained above and shown in
Figure 12. The liner sections can easily be installed as the layers of brick are being placed. Since this is a new
chimney, we recommend that you build it to the right size so you do not have to ovalize the liner but if you choose
to use a 6"x10" clay liner you will need to ovalize the stainless steel liner to fit into the clay liner.
REMEMBER:
The stainless-steel liner should be fitted inside the clay liner all the way to the top of the masonry
chimney. It is not meant to replace the clay liner.
COVERING THE FIREPLACE FACING
Facing materials (see Figure 4) MUST BE NON-COMBUSTIBLE such as metal, brick, slate or ceramic tile. Gypsum
board is NOT an acceptable facing material. Gypsum board cannot get closer to the fireplace than the side and top
standoffs.
Facing this fireplace can be as simple as using cement boards that will be painted or gluing ceramic tiles with high
temperature silicone sealant. Make sure to maintain a distance around the doors that will allow them to open. Do
not cover or block any part of the louvers or the openings on each side of the firebox.
HEARTH EXTENSION
The area immediately in front of the fireplace must be protected by a non-combustible material such as brick, tile,
stone, or slate. Refer to Table 1 (G-H) for the depth and width the hearth protection should extend beyond the front
and both sides of the door opening (see Figure 1). There is no minimum thickness required for the hearth extension.
Figure 12 Connection to a Masonry Chimney
Mortar
Mortar
Clearances as per
NBC or NFPA 211
EXCEL liner or other listed liner to
ULC-S635, ULC-S640 or UL-1777
12" min. to
combustible ceiling
EXCEL chimney
lenght: 18" min.
EXCEL chimney
elbow
Masonry Adaptor
FO-FDM7
Metal
Firestop
Liner
Elbow
RS
F
Fi
re
pl
ac
e
FO-FDM8
