Desa VF-24N-BTB - Manual (Page 10)

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Figure 6 - Minimum Mantel Clearances
Without Using Hood
Minimum Non-
Combustible
Material
Minimum Non-
Combustible
Material Height Distances to
Underside of
Mantel
Top of
Fireplace
Opening
Underside
of Mantel
Shelf
12"
8"
(A)
18"
14"
20"
17"
22"
19"
24"
20"
All minimum
distances are
in inches
Log Set
24" Models
18" Model
2 1/2 "
6"
8"
10"
Mantel Shelf
INSTALLATION
Continued
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
Heat Resistant
Material
(A)
Noncombus-
tible Material
Distance (A)
Requirements for Safe
Installation
12" or more Noncombustible material OK.
Between 8"
and 12" 24" Model: Install fireplace
hood accessory (GA6050,
GA6052 or GA605, see
Accessories, page 25). 18"
Model: Noncombustible ma-
terial 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 oper-
ate heater with flue damper
open.
Figure 7 - Minimum Mantel Clearances
When Using Hood
Minimum Non-
Combustible
Material
8"
Min. 12" 15" 18"
All minimum
distances are
in inches
Log Set
18" and 24"
Models
20"
2 1/2"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050,
GA6052 or
GA6053)
Top of Fireplace
Opening
Underside of
Mantel Shelf
Mantel Shelf
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 informa-
tion below.
You must have noncombustible material(s) above
fireplace opening. Noncombustible materials (such
as slate, marble, tile, etc.) must be at least 1/2"
thick. With sheet metal, you must have noncom-
bustible material behind it. Noncombustible mate-
rial must extend at least 8" up (for all models). If
noncombustible material is less than 12", you must
install the fireplace hood accessory (24" models
only). See Figure 5 for minimum clearances.
If Using Mantel
You must have noncombustible material(s) above
the fireplace opening. Noncombustible materials
(such as slate, marble, tile, etc.) must be at least
1/2" thick. With sheet metal, you must have non-
combustible 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. Even if
noncombustible material is more than 12", you
may need the hood accessory to deflect heat away
from your mantel shelf (24" models only). See
Figures 5, 6 and 7 for minimum clearances.
IMPORTANT
: If you cannot meet these minimum
clearances, you must operate heater with chimney
flue damper open. Go to Installing Dmanper
Clamp Accessory for Vented Operation, page 11.