Monessen Hearth Vent-Free Fireplace Systems DBX24C* Installation And Operating Instructions Manual page 19

When finishing a custom cabinet, mantel, or other built-in enclosure,
the opening size to accommodate the fireplace with trim installed is
as follows:
DFX24C w/ trim
H 25 "
3
J 26 / "
4
1. Bend out the nailing flanges located on each side of the firebox.
2. Slide the firebox into prepared framing or position firebox in its final position and frame later.
3. Level the firebox by checking the top edge of the firebox. Shim if necessary.
4. Anchor firebox to the side framing members using 8d nails or other suitable fasteners. See Figure 26.
5. The canopy must be installed for safe operation of the heater. See page 14 for canopy installation details.
Nail Sides
Through Nailing
Flanges
33D4047
DBX24C w/ trim DFX32C w/trim
25"
3
26 / "
4
The fi replace must be installed giving full
consideration to the clearance and height
requirements identifi ed in this manual.
Figure 26 - Location of Nailing Flanges
32 13 / "
16
1
31 / "
4
FIREPLACE FRAMING
H
Figure 25 - Custom Cabinet
J
19