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Innovative Hearth Products
Superior
DRT/DRC3500 Series Direct-Vent Gas Fireplaces
TM
MINIMUM CLEARANCES TO COMBUSTIBLES
Fireplace And Vent Clearances
The fireplace is approved with zero clearance to combustible materials on all sides (Table 8), with the following
exception: The unit may not be recessed (allowance made for mantel legs / side trim in Figure 6). 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 (Figure 6).
Table 8: Minimum Clearances *
clearance immediately in front of viewing area(s)
* 3" (76 mm) above any horizontal/inclined vent component.
** See Page 21 for clearance requirements to the nailing flange located at each side of the unit and any screw heads adjacent to it.
The fireplace must be mounted on a fully supported base extending the full width and depth of the unit. The fireplace
may be located on or near conventional construction materials. However, if installed on combustible materials, such
as carpeting, vinyl tile or other combustible material other than wood flooring, the appliance shall be installed on a
metal or wood panel extending the full width and depth of the appliance.
Hearth Extension
A hearth extension is not required with this fireplace. If a hearth extension is used, do not block the lower control
compartment door. Any hearth extension used is for appearance only and does not have to conform to standard
hearth extension installation requirements.
Shelf Height
To provide for the lowest possible shelf surface, use the rear vent model. For top vent models, the venting attached
to the top vent should be routed in a way to minimize obstructions to the space above the fireplace. Do not insulate
the space between the fireplace and the area above it (Table 9 and Table 10). The minimum height from the base
of the fireplace to the underside of combustible materials used to construct a utility shelf in this fashion is shown in
Table 9 and Table 10.
Table 9: Combustible Shelf Height—Top Vent
Model
35" Models
40" Models
45" Models
*In alternative, Rear Vent applications, Top Vent will be sealed as detailed in Installation
Sequence Step 3.5.
Back
Sides
Top Standoffs
Floor
From Bottom of Unit to Ceiling
Vent
Front Service Clearance—
Top Vent with one 90° Elbow
Secure Flex
Secure Vent
®
(flex elbow)
47" (1194 mm)
49" (1245 mm)
52" (1321 mm)
54" (1372 mm)
52" (1321 mm)
54" (1372 mm)
1" (26mm) to wrapper
0" (0 mm) to Spacers
1/2" (13 mm) to wrapper
0" (0 mm) to Spacers **
0" (0 mm) to top standoffs
0" (0 mm)
64" (1626 mm)
3" (76 mm)—Top *
1" (25.4 mm)—Sides and Bottom
36" (914 mm)
Alternative Rear Vent
applications*
®
Secure Vent
®
41" (1042 mm)
46" (1169 mm)
46" (1169 mm)
Installation
900298-00, 10/2014
No com-
bustibles or
insulation
in the
shaded area
Shelf Height
between the
(see table)
appliance
and the
shelf
above it.
15
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