Mobile Home Installation; Outside Air Duct - RSF Woodburning Fireplaces ONYX AP Owner's Manual

39"
"
18
1/2
29 1/2"
Figure 5: Unit dimensions
2. Frame an area to fit the Onyx AP. Follow the framing dimensions on (Figure 5).
3. Prepare the unit for installation. The holes in the side stand-offs have been elongated to allow easy alignment
of the framing and the fireplace sides. The end of the L-shaped part of the standoff should be flush with the
face of the fireplace so the fireplace does not appear recessed when the wall facing is put in place.
4. Push the Onyx AP into the pre-framed area, then hammer nails through all of the holes in the stand-offs to
secure the fireplace in that position.
WARNING: No insulation or other materials are allowed between the framing and the fireplace.

MOBILE HOME INSTALLATION

Installation is the same as any residential installation. Please note the following restrictions in mobile homes:
1. You must use a vented roof flashing.
2. The gravity vent system option is not allowed.
3. The central heating system is not allowed.
CEILING CLEARANCE
Ceiling Clearance is the distance from the top of the fireplace to the ceiling.
If the space between the top of the fireplace and the ceiling joists is less than 45 inches, the enclosure around the
fireplace MUST be vented. Place a minimum 3" X 10" vent grille into holes cut within one foot of both the floor and
ceiling levels, to allow room air to circulate through the fireplace enclosure and reduce heat build-up. These vent
grilles may be placed vertically or horizontally. Under no circumstances is the distance between the first firestop
and the top of the unit to be less than 33 inches (See Figure 2).

OUTSIDE AIR DUCT

After the fireplace is correctly positioned, connect the combustion air inlet to the outside (see Figure 6).
A 4 inch diameter duct can be used if the total run of the pipe is less than 25 feet. If the total run is longer than 25
feet, a 5 inch diameter pipe must be use.
1. Find a convenient location for the combustion air duct and register. The location of the register may be above
or below floor level.
2. Make a 4 1/4"(5 1/4" if using a 5" diameter duct) hole in the outside wall of the house. Mount the register in the
hole from the outside with the inlet facing down.
3. Place the insulated flexible duct over the register tube and outside air connector sleeve. At both ends,
carefully pull back the insulation and plastic cover, exposing the flexible duct. Then at each end, attach the duct
with metal screws to the inlet and tube. Carefully push the insulation and cover back over the duct. Tape the
plastic cover in place with the 2" aluminum duct.
ONYX AP Owner's Manual
6 1/2"
5"
4"
10
24"
23"
12"
42"
46 1/2"
43 1/2"
39"
4 1/4"
10 3/4"
RSF Woodburning Fireplaces