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Access Modification - Combustion Air Kits, Gas & Electrical Line Feed
A Four Inch (4") Combustion air inlet kits are recommended by
Earthcore and may help improve fireplace operation in homes
tightly sealed and with other ventilating appliances installed
(Figures 61 & 62)
. The following is a general representation of a
combustion air kit that is recommended by Earthcore Industries.
The combustion air kit consist of a sliding stainless steel or
black access door affixed to a four-inch (4”) in diameter stainless
steel sleeve approximately twelve inches (12”) long. An exterior
vent with dress plate, weather hood, and rodent prevention
screen of a maximum quarter inch (1/4”) wire mesh and ten
feet (10') of hose completes the kit.
The access door is fitted into the front 1/3 of the side wall.
The twelve-inch (12”) long sleeve can be introduced into the
firebox side wall by core drilling an appropriately sized hole at
the selected firebox location. Keep the top of the access hole
no more than six inches (6”) above the finished firebrick floor.
The hole size should allow for a quarter inch (1/4”) mortar joint
around the air access sleeve for heat expansion. Do not install in
the rear of the firebox because sparks will be blown into room.
The sleeve passes through the firebox side wall and must
be connected to a UL Listed Air Duct pipe that leads to the
source for outside combustion air, as directly as possible from
the fireplace. The duct cannot rise vertical higher than the
finished opening of the firebox.
If the installation is to be longer than ten feet (10'), then the
six-inch (6") adapter will be needed. This adapter will attach to
the existing four-inch (4") sleeve outside of the unit. The six inch
adapter includes an additional twenty feet of 6" flex hose, for a
maximum run of thirty feet (30').
WARNING:
Do not use combustible duct material. Avoid
installing a combustion air inlet where the opening could be
blocked by snow, bushes, or other obstacles. Air inlet ducts
shall not terminate in attic, basement, or garage spaces.
Gas Line Feed
: For a fireplace having the provision for installation
of a gas pipe, the provision is intended only for connection to a
decorative gas appliance.
CAUTION:
When using the decorative appliance, the fireplace
damper must be set in the fully open position. Gas line for gas
log sets used in the Isokern firebox can be routed through the
side wall, by drilling an appropriately sized hole using a masonry
drill bit
(Figure 62)
.
Electrical Line Feed:
The line can be routed through the
MAGNUM firebox side walls by drilling an appropriately sized hole
using a masonry drill bit
(Figure 63)
. Be sure to follow the gas
log Appliance Manufacturer’s explicit electrical line connection
instructions for vented masonry fireplace installations. Gas line
and electric line must be fed through separate access holes.
CAUTION:
All access holes must be grouted with mortar – after
line or conduit feed – to seal any gaps or cracks around line feed
conduits
(Figure 61)
.
Flex Duct To Fireplace
(All Parts Noncombustible)
Exterior
Wall
Exterior Air Vent
With Dress Plate
Typical Placement of
Gas or Electric Conduit
(See Detail Below)
CAUTION:
All access holes must be
grouted with mortar - after
line or conduit feed to seal
any gaps or cracks around line
feed conduits
Fire Brick Side
Gas or Electric
Conduit
NOTE: Fill Any Gaps
Around Conduit with Mortar
FIGURE 61
FIGURE 62
FIGURE 63
Earthcore Industries
MAGNUM Series Fireplace
