Outside Air Kit - Lennox Hearth Products Montecito Installation And Operation Instructions Manual

Flashing Collar
Flashing
Firestop
Figure 17
The duct system must be installed respecting
the following:
1. Remove the plates closing up the 8" dia. holes
on top of the fireplace. Then, cut the insula-
tion in order to obtain two 8" dia. openings.
Fix the adaptors on the fireplace openings
by turning clockwise (Figure 15).
2. Maintain at least a 2" (50 mm) clearance
between the ducts and any combustible
material; the required hole size is 13" x 13"
(330 mm x 330 mm).
Exception #1: For the grills, the fram-
ing can be 10-3/4" x 10-3/4" (275 mm
x 275 mm) to provide the clearance as
required by the integral spacers on the
double outlet duct system.
3. The maximum number of elbows in a run
of duct is two.
4. Maintain at least 6-1/2" (160 mm) clearance
from the outlet grill framing to a combustible
ceiling, side wall or mantel.
Rain Cap
Roof Support
Attic Radiation Shield
6-1/2" Min.
(165mm) to ceiling
68" Min.
(1727mm)
42" Min.
(1067mm)
Non-Combustible
Facing
5. When traversing a combustible wall or floor,
a firestop must be installed at the wall or
floor penetration. The hole size must be
13" x 13" (330 mm x 330 mm)
6. Do not connect the hot air ducts to a central
heating system. Malfunction of the heating
system's blower will cause the fireplace to
overheat. A furnace duct is only single wall
and not double wall as is required for the
Montecito fireplace hot air exhaust.
7. Use only Lennox Hearth Products grills and
components as described in this manual.
Other grills or registers, for example, may
be too restrictive and may overheat the
fireplace or ceiling.
8. Do not use insulated flexible ducts as they
will overheat.
9. Do not use tees or any other components
than the ones specifically listed here.
10. Never allow the ducting to pitch down as
hot air will be trapped creating a fire hazard.
Never route the ducting downwards.
11. The hot air outlet grills must be installed with
the louvers pointing downwards in order to
prevent overheating adjacent ceilings.
12. Always install the two outlet grills when
using the double hot air outlet kit.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

OUTSIDE AIR KIT

It is mandatory to install an outside air connec-
tion to the Montecito™ wood burning fireplace.
The following components are required and are
included with the fireplace:
• Outside air kit (includes 40 inch flex that
goes up to ten (10) feet long)
• 4" Adaptor for fireplace connection
The outside air assembly must be installed ac-
cording to the following requirements:
Outside Air Installation
The outside air assembly may be installed ac-
cording to the following requirements:
A) Duct length should be kept to a minimum.
The maximum length of a 4" interior diameter
(100 mm) insulated flexible duct is twenty
(20) feet (6.1 m). (See note below).
B) The air intake register must not be installed
more than ten (10) feet (3050 mm) above
the base of the fireplace.
C) The fresh air must come from outside the
house. The air intake must not draw air from
the attic, basement or garage.
D) The air intake should be installed where
it is not likely to be blocked by snow or
exposed to extreme wind and away from
automobile exhaust fumes, gas meters and
other vents.
E) The duct and register may be installed above
or below floor level.
Make a 4-1/4" (110 mm) hole in the outside
wall of the house at the chosen location. From
outside, place the outside air register in the hole
(open side down) and fasten the register to the
wall with screws as shown (see Figure 18).
Slip the pipe into the insulated sleeve. Place
the insulated pipe over the register tube and
over the fireplace's outside air connector (see
Figure 19). At each end, carefully pull back the
insulation and plastic cover exposing the flex-
ible pipe. Using the aluminium tape provided,
wrap the tape around the joint between the
flexible pipe and the air inlets. Carefully push
the insulation and plastic cover back over the
pipe. Using aluminium tape, fasten the plastic
cover in place.
NOTE: We recommend not to exceed twenty
(20) feet of 4" flexible pipe. If you require a
longer length we recommend that you use a 5"
diameter flexible pipe for the complete run up
to thirty (30) feet and a 6" diameter pipe for a
run of up to forty (40) feet.
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