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105072
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
Heat Resistant
Material
(A)
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
INSTALLATION
Continued
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. If
noncombustible material is less than 12",
you must install the fireplace hood acces-
sory. Even if noncombustible material is
more than 12", you may need the hood
accessory to deflect heat away from your
mantel shelf. See Figure 5, and Figures 6
and 7, page 9, for minimum clearances.
Minimum Noncombustible
Material Clearances
If Not Using Mantel
Note:
If using a mantel, see If Using
Mantel. If not using a mantel, follow the
information below.
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 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 for minimum clearances.
IMPORTANT:
If you cannot meet these
minimum clearances, you must operate
heater with chimney flue damper open. Go
to Installing Damper Clamp Accessory for
Vented Operation, page 10.
IMPORTANT:
If you cannot meet these
minimum clearances, you must operate
heater with chimney flue damper open. Go
to Installing Damper Clamp Accessory for
Vented Operation, page 10.
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.
Noncombustible Requirements for
Material Distance (A) Safe Installation
12" or more Noncombustible material OK.
Between 8" and 12" 24" or 30" Models: Install fireplace hood accessory
(HDABK or HDABR see
Accessories
, page 24).
18" Model: Noncombustible material OK.
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.