
PRE-INSTALLATION 
PREPARATION
CLEARANCES
Minimum clearances to combustibles are:
•Back and Sides of Outer Surround . . . 0" min.
•Drywall to Sides of Front Face
(Nailing Flanges). . . . . . . . . . . . . . 0" min.
•“B” Vent Surfaces. . . . . . . . . . . . . . . . 1" min.
•Ceiling to Opening . . . . . . . . . . . . . . 42" min.
•Floor . . . . . . . . . . . . . . . . . . . . . . . . . . 0" min.
•Perpendicular Wall . . . . . . . . . . .See Figure 6
 CAUTION: Do not block required air spaces with insu- lation or any other material. Do not obstruct effective opening of appliance with any type of facing material.
  | Nailing 2 x 4 Stud  | |
Left Side  | Flange  | 
  | 
Back  | 
  | |
Surround  | 
  | 
  | 
  | 0" Clearance  | 
  | 
  | 
  | 0"  | 
  | Front Face  | Drywall  | 
  | 
  | |
Figure 3 - Minimum Clearances | ||
  | (Top View)  | 
  | 
  | 1" (25mm) Min.  | |
  | Clearance to  | 
  | 
  | "B" Vent's Outer Pipe  | |
  | Ceiling  | 
  | 
MANTEL CLEARANCES AND WALL | |
DETAILS | 
  | 
A combustible mantle shelf maybe installed a | |
maximum 12" (229 mm) from the wall. Figures  | |
5 and 6 show the minimum allowable distances  | |
from various combustible mantle components  | |
in relation to the fireplace opening. | |
12"  | Combustible  | 
(229mm)  | Materials  | 
  | Header  | 
6" (152mm)  | 
  | 
A  | 
  | 
BSpacer
  | 3" (76mm)  | 
  | ||
  | 1  | 1  | /2"  | 
  | 
  | 
  | 
  | ||
  | (38mm) Max.  | 
  | ||
  | M36(B,H),  | M42(B,H),  | ||
  | M36P(B,H)  | M42P(B,H)  | ||
  | VM36(B,H),  | VM42(B,H),  | ||
  | VM36P(B,H)  | VM42P(B,H)  | ||
A  | 14" (356 mm) | 15" (381 mm) | ||
B  | 8" (203 mm) | 9" (229 mm) | ||
Figure 5 - Mantel Clearances - Side View | ||||
  | (Cross Section) | |||
  | 
  | 
  | 
  | TOP VIEW | 
  | 
  | 
  | 
  | Outer Surround  | 
  | 
  | 
  | 
  | Combustible  | 
  | 
  | 
  | 
  | Material May  | 
  | 
  | 
  | 
  | Be Used  | 
1 1/2" (38 mm)  | 
  | 
  | SAFE  | |
  | 
  | ZONE  | ||
Max.  | 3" (76 mm)  | 
  | 
  | 
  | 
42" (1067mm) Min. Clearance from Opening to
Ceiling 0" Clearance
Maintain 2" (51mm) Min. Clearance to the Transition Pipe as Measured at the Outer Vent Collar
Max.  | 
  | 
6" (152 mm)  | 
  | 
Max.  | 
  | 
A  | Perpendicular  | 
  | |
B  | Wall  | 
*
0" Clearance to 
 Combustible or Noncombustible Flooring ![]()
![]()
*  | *  | 
DO NOT BLOCK  | |
OR OBSTRUCT  | |
  | OPENINGS  | 
*Required Air Spaces are
Indicated with  | |
an "  | ". Do Not  | 
*  | 
  | 
Pack with  | |
Insulation or Any  | |
Other Material  | |
  | M36(B,H),  | M42(B,H),  | 
  | M36P(B,H)  | M42P(B,H)  | 
  | VM36(B,H),  | VM42(B,H),  | 
  | VM36P(B,H)  | VM42P(B,H)  | 
A  | 9" (229 mm) | 6" (152 mm) | 
B  | 12" (305 mm) | 9" (229 mm)  | 
Figure 6 - Side Clearances - Top View | ||
Figure 4 - Minimum Clearances (Front View)
(Cross Section) | 
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