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8
Majestic Fireplaces® BR/BC Series
7412944
Insulating Fireplace Enclosure
for Cold Climates
Installation
Chimney Supports
The chimney system is supported by the fireplace for
vertical chimney heights less than 30' (9m) above the
hearth. Chimney supports are required if the vertical
height exceeds 30' (9m) with SK8 chimneys or 20'
(6m) with 3-wall chimneys. Locate chimney supports
at ceiling holes or other structural framing at 30' (9m)
(SK8) or 20' (6m) (3-wall) heights. Spacing between
chimney supports must not exceed 30' (9m) (SK8) or
20' (6m) (3-wall). Use Chimney Support Model SKCS8.
(NOTE: The SKCS8 can not be mounted directly
to the fireplace.) Support provided by elbow straps
fulfills the support requirement only if they are spaced
as previously described. (A chimney support is 2¹⁄₂"
(64mm) long when installed.)
Angled chimney runs require a support every 6' (1.8m)
in addition to the elbow straps. Chimney supports are
used for this function. (Fig. 9)
Chase Installation
A chase is a vertical box-like structure which encloses
the fireplace and/or chimney. Chases are typically built
on the outside of the house with fireplace opening cut
into the outer wall of a room. (Page 5, Fig. 5)
If you need help in determining fireplace location or
how the chimney system should be run, contact your
Majestic Fireplaces dealer for assistance.
If you live in a cold climate, it is not required but
highly recommended that you insulate fireplace
enclosure to eliminate cold air penetration as much as
possible.
Insulate base of fireplace with a noncombustible
insulation rated for a minimum of 300°F. Insulating
is very important for outside wall installations over
a concrete slab. If fireplace is installed on a platform,
insulation should be placed on top of the platform
before fireplace is set. (Fig. 10)
When a fireplace is installed in a chase or on a
outside wall, enclosure should be treated like any
outside wall in a home. Insulation should be installed
on the inside wall as well as the outside wall(s). In a
chase, it is also a good idea to install a firestop at the
first ceiling level above the fireplace and enclose the
chase with sheeting material. Insulation may then be
installed above sheeting material to assure the space
around the fireplace is totally protected. (Fig. 5)
When installing the chimney, DO NOT caulk between
outer pipe and firestop. It is vital that some air be al-
lowed to flow through this very thin gap.
CAUTION: WHEN INSTALLING A FIREPLACE
IN AN INSULATED ENCLOSURE, BE SURE ALL
REQUIRED AIR SPACES ARE MAINTAINED. (Page
14, Figure 20)
FP284
Fig. 9 Chimney support installation
IWF284
MBUF
5/25/96
Chimney Sup-
port Strap
SKCS8