FOR REFERENCE ONLY! REFER TO MANUAL PRIOR TO INSTALLATION
FINISHING
FRAMING
The LINEAR 50 MUST be covered with cement board at least ½" thick.. Cement board
will allow you to finish the facing of the fireplace with any non-combustible material you
like.
FIREPLACE FACING
Facing materials must be NON-COMBUSTIBLE such as cement board, metal, brick, slate
or ceramic tile. Gypsum board is NOT an acceptable facing material. The only
combustible material accepted on the facing of the fireplace is for a mantel (shelf and
posts).
MANTEL
Masonry and other non-combustible mantels (shelf and posts) can be placed anywhere
around the fireplace opening.
For combustible mantel shelves (combustible mantel posts are not permitted), the
maximum depth is 12” and the minimum clearance to the door opening is 12”. See
Figure 2 for an example, and Table 1 (L-M) for details.
The only combustible material accepted on the facing of the fireplace is for a mantel
shelf.
HEARTH EXTENSION
The area immediately in front of the fireplace must be protected if the surface is
combustible. Refer to (D-E) for the depth and width that the hearth extension protection
should extend beyond the front and both sides of the fireplace opening (see Figure 2).
Non-combustible flooring material such as brick, tile, stone, or slate must be used as
finishing material over the hearth extension area.
The non-combustible flooring material must have the same minimum dimensions as the
hearth extension (see (D-E)).
If the LINEAR 50 is installed on a non-combustible floor, none of the protection above is
needed.
RAISED HEARTH EXTENSION
A raised hearth extension is permitted if the materials used to make the structure and to
cover it are all non-combustible such as steel studs, cement blocks, etc. No combustible
materials are allowed above the floor level on which the bottom standoff resides below
the fireplace.
A non-combustible raised hearth extension can be constructed as high as the hearth
threshold, making it a flush hearth extension. The HRS air inlets will either have to be
located on the sides or back of the fireplace, or framed on the raised hearth extension
and connected by the duct to the front knockouts.
