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Earthcore Industries
MAGNUM Series Fireplace
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The DM chimney is a dual module, refractory masonry
chimney system. It is composed of two precast mating
components, the outer casing liner, and an inner liner.
This chimney system is designed for installation in
accordance with the National Fire Protection Standard for
Chimneys and Solid Fuel-Burning Appliances, NFPA 211
and in accordance with codes, such as ICC, BOCA Basic/
National Codes, the standard Mechanical Code, and the
Uniform Building Codes.
Required DM Chimney Clearance
The DM chimney system, rated UL 103HT, is listed for
zero clearance to normal construction materials. The DM
chimney system may be enclosed in a wood chimney
chase at zero clearance to wood framing members.
Since lateral support is required for DM chimneys the
framing members will be in contact with the DM chimney
system.
IMPORTANT:
“Combustibles” are defined as “normal
construction materials” and are considered to be: framing
materials, particle board, mill board, drywall, plywood
paneling, plywood sub flooring, and wood flooring.
Keep all insulation, vapor barriers, “house wrap” paper
and other insulating type membranes and products,
including fiberglass, cellulose and other insulation,
(anything that carries an “R” rating) a minimum of three
inches (3”) away from all firebox and chimney surfaces.
EXCEPTION:
If insulation is used in walls surrounding the
fireplace, insulation may be installed behind sheathing of
gypsum board, plywood, particle board, or other material
on the side facing the Isokern. The facing material cannot
be within 1½” to the fireplace side walls.
Mechanical Vent Systems
It is acceptable to use mechanical draft systems, if the
venting companies do the engineering calculations and
make the necessary recommendations for fan size and
flue vent diameter following the guidelines of NFPA
211/2006, pages 211-13. Installation of such systems
must also follow the mechanical drafting company’s
explicit installation and operation instructions.
Isokern DM Chimney Weights
Total installed chimney weight will vary and be based on
the overall height and the configuration of the chimney
system. Chimneys may be straight vertical stacks of DM
outer casing and inner liner
(see page 3
) but may also
include the use of offset chimney blocks, brick ledge,
chimney reinforcement, brick/stone veneers, cement
crown caps and clay chimney pot termination with
additional structural support.
DM Chimney Components & General Information
Component
Part#
Description
12”
16½”
13½”
6”
16½”
13½”
21
½”
21
½”
12”
21
½”
25”
6”
70003
Isokern DM Chimney
6" Inner Liner
70235
Isokern DM Chimney
12" Inner Liner
45433
Isokern DM Chimney
12" Outer Liner
40136
Isokern DM Chimney
Offset Block
40111
Isokern Brick Ledge
50001
50003
ISO-Cap Spark Arrestor -
Stainless Steel
ISO-Cap Spark Arrestor w/Damper -
Stainless Steel (Shown)
Fits Inner Liner
32
½
”
32
½
”
3”
50006
ISO-Cap Spark Arrestor -
Copper
Fits Inner Liner
50004
ISO-Cap Spark Arrestor -
Black Galvanized
Fits Outer Liner
Isokern Small Crown Cap
Isokern Large Crown Cap
40322
40323
