Installation
b
uilt
-i
n
i
nStallation
:
Installation without a masonry fireplace -
The M55C-FPI can be installed without an existing masonry fireplace by building an enclosure for the
unit to be installed in. This enclosure must be a minimum of 18” deep, 36” wide and 23-1/4” high and
made with ½” noncombustible cement board. The floor of the enclosure must consist of a minimum of
1-1/4” air space and a layer of ½” noncombustible cement board and a layer of tile. The air space must
be supported with sheet metal studs and have no combustible material in the air space. All venting for
Built-In installation must use PL or L venting and be installed with vent manufacturer’s recommended
clearances. Refer to page 9 for Clearances to Combustibles.
36"
1 14 "
48"
37"
16"
26"
18"
11 12 "
9 58 "
18"
23 1/4"
5 18 "
4 78 "
11 58 "
CL
2X4 Steel studs
minimum 1-1/4" thick
Wood Trim
Cement board
box and facing
Cement board
screwed to steel studs
Wood Framing
Wall
Thimble
Tile over cement
board
Optional fresh
air intake
14
Figure 11: Built-In Specifications
