C. Clearances
WARNING! Risk of Fire! Maintain specified 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 fireplace or chimney.
•Failure to maintain airspace may cause overheating and a fire.
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.
Note: The appliance must be raised 1 1/4 in. (32 mm) off floor so the Harbor System can be used. Adjust framing and vent locations accordingly.
1/2 in. (13 mm)
1/2 in.
(13 mm)
Drywall
0 in.
Combustible flooring may be installed next to the front of the appliance.
30in. (762 mm) clearance to ceiling
0 (Clearance to
Standoffs)
Note: If the inside of the framed cavity is to be finished, the framing dimensions must include the finished surface. Example: If drywall is to be attached to the rear wall, the depth must be measured from the drywall surface.
Note: All pipe clearance specifications are per vent manufacturer's installation
instructions.Per Vent Manufacturer’s Specifications
B
Combustible Object
36in.
(914 mm)
0 in.
C 
A
|
| A | B | C |
|
| Rough Opening | Rough Opening | Rough Opening |
Model |
| (Width) | (Height) | (Depth) |
CB4236I | in. | 42 | ||
|
|
|
|
|
| mm | 1,067 | 984 | 597 |
CB4842I | in. | 48 | ||
|
|
|
|
|
| mm | 1,219 | 984 | 597 |
Figure 5.2 Clearances to Combustibles
18 | Heatilator • Caliber BV Series • |
