9
Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
B
C
A
2 in. (51 mm)
min. air space
clearance
from chimney.
Header MUST NOT be notched!
D
D = extra space needed for outside air connection.
If outside air duct has no bend, this dimension may be
reduced as long as minimum clearances are met.
Model
A
B*
C**
D
in.
42
21 1/ 2
39 3/ 4
8
mm
1067
546
1010
203
in.
48
21 1/ 2
39 3/ 4
8
mm
1219
546
1010
203
* If interior of chase will be drywalled, add the thickness to
this measurement.
** Adjust header height for a raised floor under fireplace.
MEL36
MEL42
C. Frame the Fireplace
NOTICE:
Hearth extension design should be determined
before installation of fireplace.
Figure 3.3 shows a typical framing of the fireplace, assum-
ing combustible materials are used. All required clearanc-
es to combustibles around the fireplace must be adhered
to. See Figure 3.2. Any framing across the top of the fire-
place must be above the level of the top standoffs.
The finished cavity depth must be no less than 21 1/2 in.
(546 mm) from the finished backwall to the outside of front
wall framing.
WARNING! Risk of Fire! You must comply with all
minimum air space clearances to combustibles.
DO NOT
pack required air spaces with insulation or other materi-
als.
WARNING! Risk of Fire!
Comply with all minimum clear-
ances specified.
• A minimum 1/2 in. (13 mm) air clearance must be
maintained at the back and sides of the fireplace
assembly.
• Chimney sections at any level require a 2 in. (51 mm)
minimum air space clearance between the framing and
chimney section.
• Clearance of Radiation Shield thimble to chimney is set
at 1 1/2 in. (38 mm)
CAUTION! Risk of Cuts/Abrasions. Wear protective gloves
and safety glasses during installation. Sheet metal edges
are sharp.
WARNING! Risk of Fire!
Prevent contact with sagging,
loose insulation.
•
DO NOT
install against vapor barriers or exposed
insulation.
• Secure insulation and vapor barriers.
• Provide minimum air space clearances at the sides and
back of the fireplace assembly.
D. Secure and Level the Fireplace
This fireplace may be placed on either a combustible or
noncombustible continuous flat surface. Follow the instruc-
tions for framing in Section 3. Slide the fireplace into posi-
tion. Be sure to provide the minimum 1/2 in. air clearance
at the sides and back of the fireplace.
The fireplace should be positioned so the face of the non-
combustible material on the fireplace will be flush with the
face of the drywall on the walls.
Level the fireplace and shim as necessary.
The fireplace must be secured to the manufactured hous-
ing structure to prevent the fireplace from shifting during
transportation. This can be done by securing through the
nailing flanges on the sides of the fireplace and tabs on the
bottom pan.
Figure 3.3 Framing the Fireplace
1/2 in.
(13 mm)
Fireplace must be set out
1/2 in. (13 mm) in front of
the face of the framing
material.
WARNING! Risk of Fire! A hearth extension built flush
with the fireplace opening or less than 4 in. (102 mm)
below the fireplace opening requires the fireplace be
installed on a non-combustible surface.
CAUTION!
The structual integrity of the manufactured
housing floor, wall, ceiling and roof must be maintained.
