www.desatech.com
108795-01N
7
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.
Figure 3 - Minimum Clearances
(Top View)
0"
0" Clearance
Nailing
Flange
Front Face
Left Side
Surround
Back
Drywall
2 x 4 Stud
Figure 4 - Minimum Clearances
(Front View)
*
*
*
*
42" (1067mm)
Min. Clearance
from Opening to
Ceiling
0" Clearance
Ceiling
1" (25mm) Min.
Clearance to
"B" Vent's Outer Pipe
Maintain 2" (51mm) Min.
Clearance to the Transition
Pipe as Measured at the
Outer Vent Collar
Required Air
Spaces are
Indicated with
an "*". Do Not
Pack with
Insulation or Any
Other Material
DO NOT BLOCK
OR OBSTRUCT
OPENINGS
0" Clearance to
Combustible or
Noncombustible
Flooring
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.
Spacer
3" (76mm)
1
1
/
2
"
(38mm) Max.
B
6" (152mm)
A
12"
(229mm)
Combustible
Materials
Header
Figure 5 - Mantel Clearances - Side View
(Cross Section)
M36(B,H),
M36P(B,H)
VM36(B,H),
VM36P(B,H)
M42(B,H),
M42P(B,H)
VM42(B,H),
VM42P(B,H)
A
14" (356 mm)
15" (381 mm)
B
8" (203 mm)
9" (229 mm)
1
1
/
2
" (38 mm)
Max.
3" (76 mm)
Max.
6" (152 mm)
Max.
A
B
Outer Surround
Combustible
Material May
Be Used
TOP VIEW
SAFE
ZONE
Perpendicular
Wall
Figure 6 - Side Clearances - Top View
(Cross Section)
M36(B,H),
M36P(B,H)
VM36(B,H),
VM36P(B,H)
M42(B,H),
M42P(B,H)
VM42(B,H),
VM42P(B,H)
A
9" (229 mm)
6" (152 mm)
B
12" (305 mm)
9" (229 mm)
