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105223
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INCORPORATED
Minimum Noncombustible
Material Clearances
If Not Using Mantel
Note:
If using a mantel, proceed to If Using
Mantel. If not using a mantel, follow the
information below.
You must have noncombustible material(s)
above both fireplace openings. Noncom-
bustible materials (such as slate, marble,
tile, etc.) must be at least 1/2 inch thick.
With sheet metal, you must have noncom-
bustible material behind it. Noncombus-
tible material must extend at least 8" up (for
all models). If noncombustible material is
less than 12", you must install the fireplace
hood accessory. See Figure 5 at right for
minimum clearances.
IMPORTANT:
If you cannot meet these
minimum clearances, you must operate heater
with chimney flue damper open, see Install-
ing Damper Clamp Accessory, page 10.
INSTALLATION
Continued
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
Heat Resistant
Material
(A)
Noncombustible Requirements for
Material Distance (A) Safe Installation
12" or more Noncombustible material OK.
Between 8" and 12" Install fireplace hood accessory (HDABK, or
HDABR, see
Accessories,
page 21).
Less than 8" Noncombustible material must be extended to at
least 8". See
Between 8" and 12",
above. If you
cannot extend material, you must operate heater
with flue damper open.
NOTICE: Manual control heaters
may be used as a vented product.
If so, you must always run heater
with chimney flue damper open.
If running heater with damper
open, noncombustible material
above fireplace opening is not
needed. Go to
Installing Damper
Clamp Accessory for Vented Op-
eration
, page 10.
If Using Mantel
You must have noncombustible material(s)
above the fireplace opening. Noncombus-
tible materials (such as slate, marble, tile,
etc.) must be at least 1/2 inch thick. With
sheet metal, you must have noncombustible
material behind it. Noncombustible mate-
rial must extend at least 8 inches up (for all
models). If noncombustible material is less
than 12", you must install the fireplace hood
accessory. Even if noncombustible material is
more than 12", you may need the hood acces-
sory to deflect heat away from your mantel
shelf. See Figure 5 this page and Figures 6 and
7, page 9 for minimum clearances.
IMPORTANT:
If you cannot meet these
minimum clearances, you must operate heater
with chimney flue damper open, see Install-
ing Damper Clamp Accessory, page 10.