Figure 11 - Side Wall Clearances
14
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
General Information
900355-01, 07/2015
Innovative Hearth Products
DRT63ST Direct-Vent Gas Fireplaces
Figure 10 - Mantel Clearances
4" (102 mm) above any horizontal/inclined vent component.
See
Step 1 ("FRAMING")
on
Page 15
for clearance requirements to
nailing flanges on each side of unit and any adjacent screw heads.
Min. Height of Combustible Enclosure
To provide for the lowest possible combustible enclosure (or shelf)
surface, the venting should be routed in a way to minimize obstructions
to the space above the appliance. Do not insulate the space between the
appliance and the area above it (see
Figure 9
).
Wall Finishes / Surrounds / Mantels
NOTE:
Combustible wall finish materials and/or surround materials must
not be allowed to encroach the area defined by the appliance front faces
(black sheet metal). Never allow combustible materials to be positioned
in front of or overlapping the appliance face. See
Pages 32 and 33
.
Non-combustible materials, such as surrounds and other appliance trim,
may be installed on the appliance front face with these exceptions: they
must not cover any portion of the removable glass panel.
Vertical installation clearances to combustible mantels vary according
to the depth of the mantel (see
Figure 10
)
.
Mantels constructed of
non-combustible materials may be installed at any height above the
appliance opening.
NOTE:
Use high-temperature paint (rated 175°F or higher) on the un-
derside of the mantel.
Minimum clearance requirements include any projections such as
shelves,window sills, mantels, etc. above the appliance.
NOTE:
Attic insulation shield (H3908, see
Page 35
) must be in-
stalled when blown or loose-fill insulation is used, and is required
for all attic installations.
7 (178)
2
(51)
4
(102)
6
(152)
8
(203)
10
(254)
12
(305)
9 (229)
13 (330)
17 (432)
15 (381)
11 (279)
Side View
Inches
(millimeters)
Mantel Depth
Minimum Distance to Unprotected Side Wall
Top of Appliance
Distance from top of appliance
to bottom of mantel
MINIMUM CLEARANCES TO COMbUSTIbLES
Appliance and Vent Clearances
The appliance is approved with zero clearance to combustible materials
on both sides (as detailed in
Table 5
)
, with the following exceptions:
•
When the unit is installed with one side flush with a wall, the wall on the
other side of the unit must not extend beyond the front edge of the unit.
•
In addition, when the unit is recessed, the side walls surrounding the
unit must not extend beyond the front edge of the unit (see
Figure 10
)
.
Figure 9 - Min. Height of Combustible Enclosure
Min. 2 ft vertical
vent section
and one 90-degree
elbow required
Combustible
Enclosure/Shelf
Min. 4"
(102 mm)
90" (2287 mm)
minimum
Indoor/Outdoor
91-1/2" (2324 mm)
minimum
Indoor/Outdoor
Top of
Fireplace
2 x 4
Combustible materials
are allowed in
gray
“safe
zone” illustrated here.
Combustible walls are
shown in
black
.
Protected wall is shown
in
white
.
Combustible material
may project beyond
the side of the fireplace
opening if it is within
the
gray
"safe zone"
illustrated here.
1/2"
(13 mm)
5”
(127 mm)
8-1/4"
(209 mm)
14"
(356 mm)
12”
(305 mm)
17”
(432 mm)
Top View of Fireplace
45°
Protected wall
shown in white
Gray area
is “safe
zone”
At 14" minimum
side wall clearance,
a combustible
wall can project
to any length.
At 8-1/4" side
wall clearance,
a combustible
wall can project
12" maximum.
~
~
Do NOT insulate space between
appliance and area above it.
IMPORTANT!
Min. clearance to
combustibles above any
horizontal vent component
is
4"
(102 mm)
.
MINIMUM CLEARANCES TO COMbUSTIbLES
back / Sides
0" (0 mm) Spacers
Top Spacers
0" (0 mm)
Floor
0" (0 mm)
Unit bottom to Ceiling
72" (1829 mm)
Vertical Vent Pipe
1"
(25.4 mm)
Horizontal Vent Pipe
Top: 4" (102 mm)
Sides: 1" (25.4 mm)
Bottom: 1" (25.4 mm)
SERVICE CLEARANCES
Front
3 ft (0.9 m)
Table 5
