Heatilator • LM42 • Installers Manual • 4087-901 • Rev A • 04/14/16
14
B
D
A
C
APPLIANCE MAY BE INSTALLED
OFF OF FLOOR***
NOTE: Must have
double 2 x 4 on each
side of opening.
G
E
F
E=MEASUREMENT FROM TOP OF
FIREPLACE OPENING
TO CEILING
H
I
MINIMUM FRAMING DIMENSIONS*
LM42
A
B
C*
D
E
F
G
H
I
Rough
Opening
(Vent Pipe)
Rough
Opening
(Height)
Rough
Opening
(Depth)
Rough
Opening
(Width)
Clearance
to Ceiling
Combustible
Floor
Minimum
Hearth
Depth
Standoff
Behind
Appliance
Standoff
Side of
Appliance
Inches
14-1/2
60-1/4
24
65-1/2
36
0
16
0
0
Millimeters
368
1530
610
1664
914
0
406
0
0
* = Adjust framing dimensions for interior sheathing (such as sheetrock)
***= If appliance is installed off of floor, maintain required clearances to combustibles.
Construct platform in accordance with local building codes.
Figure 3.3 Clearances to Combustibles