Heatilator • Caliber Mesh BV Series • 4040-848 Rev G • 10/08
19
0 in.
C
B
A
Note: All pipe clearance
specifications are per vent
manufacturer's installation
instructions.
0 (Clearance to
Standoffs)
30 in.
(762 mm)
clearance to ceiling
1/2 in. (13 mm)
1/2 in.
(13 mm)
Drywall
0 in.
Per Vent
Manufacturer’s
Specifications
Combustible flooring may be installed
next to the front of the appliance.
Combustible Object
36 in.
(914 mm)
Figure 5.2 Clearances to Combustibles
C. Clearances
WARNING! Risk of Fire!
Maintain speci
fi
ed air space
clearances to appliance and vent pipe:
• Insulation and other materials must be secured to
prevent accidental contact.
• The chase must be properly blocked to prevent blown
insulation or other combustibles from entering and
making contact with
fi
replace or chimney.
• Failure to maintain airspace may cause overheating and
a
fi
re.
Note:
If the inside of the framed cavity is to be
fi
nished,
the framing dimensions must include the
fi
nished surface.
Example: If drywall is to be attached to the rear wall, the
depth must be measured from the drywall surface.
Note:
The appliance
must
be raised 1 1/4 in. (32 mm) off
fl
oor so
the Harbor System can be used. Adjust framing and vent locations
accordingly.
NOTICE:
Install appliance on hard metal or wood surfaces
extending full width and depth.
DO NOT
install directly on
carpeting, vinyl, tile or any combustible material other than
wood.
Model
A
Rough Opening
(Width)
B
Rough Opening
(Height)
C
Rough Opening
(Depth)
CB4236MIR
in.
42
38-3/4
23-1/2
mm
1067
984
597
CB4842MIR
in.
48
38-3/4
23-1/2
mm
1219
984
597