Appliance And Vent Clearances - Lennox MPD-3530CNM-B Installation Instructions Manual

Merit plus series mpd direct-vent gas fireplaces
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LENNOX HEARTH PRODUCTS • MERIT
MINIMUM CLEARANCES TO COMBUSTIBLES

Appliance And Vent Clearances

The appliance is approved with zero clearance to combustible materials
on all sides (as detailed in Table 5), with the following exception: 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 3).
Hearth Extension
- A hearth extension is not required with this appliance.
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
alternate rear vent outlet, the venting attached to the top vent 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 8). The minimum height from the base of the appliance to
the underside of combustible materials used to construct a utility shelf in
this fashion is shown in Figure 8.
The appliance should be mounted on a fully supported base extending
the full width and depth of the unit. The appliance may be located on
or near conventional construction materials. However, if installed on
combustible materials, such as carpeting, vinyl tile, etc., a metal or wood
barrier covering the entire bottom surface must be used.
Figure 8: Shelf Height Minimum Clearances
8
PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS
®
Combustible Shelf Height - Inches (millimeters)
Models
Top Vent - With One 90 degree Elbow
Secure Vent
MPdT-3328
44-1/2 (1130)
MPdR-3328
MPd-3530
46-1/2 (1181)
MPd-4035
51-1/2 (1308)
MPd-4540
Do not insulate the
space between the
appliance and the
area above it.
Shelf Height
(
see table)
Shelf Above Fireplace With Rear Venting
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
MINIMUM CLEARANCES
Back
Sides
Top Spacers
Floor
From Bottom of Unit To Ceiling
Vent
SERVICE CLEARANCES
Front
Table 5
*Note: 3 in. (75 mm) above any horizontal/inclined vent component.
**Note: See Page 10, Step 1 for clearance requirements to the nailing
flange located at each side of the unit and any screw heads adjacent to it.
Rear Vent - Straight Out The Back
Secure Flex
Secure Vent
46-1/4 (1175)
33-1/4 (845)
48-1/4 (1226)
35-1/4 (895)
53-1/4 (1353)
40-1/4 (1022)
Do not insulate the
space between the
appliance and the
area above it.
Shelf Height
(
see table)
Shelf Above Fireplace With Top Venting
*
Inches (millimeters)
1/2 in. (13)
0 (0) from Spacers Or dimples
1/2 in. (13)
0 (0) from Spacers Or dimples **
0 (0)
0 (0)
64 (1626)
3 (76)
* / 1 (25.4)
Top
Sides & Bottom
Feet (meters)
3 feet (0.9 meters)
Secure Flex
33-1/4 (845)
35-1/4 (895)
40-1/4 (1022)

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