Mantel Clearances - Desa H18N Owner's Operation And Installation Manual

Noncombustible
Material Distance
(A)
12" or more
Between 8" and 12" 24", 30" or 36" Models:
Less than 8"
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
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 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 (24", 30" and 36" Models Only). Even
if noncombustible material is more than 12", you
may need the hood accessory to deflect heat
away from your mantel shelf. See Figures 5, 6
and 7 for minimum clearances.
IMPORTANT: If you cannot meet these mini-
mum clearances, you must operate heater
with chimney flue damper open. Go to Install-
ing Damper Clamp Accessory for Vented
Operation, page 12.
110399-01J
INSTALLATION
Requirements for
Safe Installation
Noncombustible mate-
rial OK.
Install fireplace hood
accessory (GA6050,
GA6052, or GA6053 see
Accessories, page 33).
18" Model: Noncombus-
tible material OK.
Noncombustible mate-
rial 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.
www.desatech.com
Continued
Minimum
Noncombustible
Material
Figure 6 - Minimum Mantel Clearances
Minimum
Noncombustible
Material
Figure 7 - Minimum Mantel Clearances

MANTEL CLEARANCES

In addition to meeting noncombustible mate-
rial clearances, you must also meet required
clearances between fireplace opening and
mantel shelf. If you do not meet the clearances
listed below, you will need a hood.
Determining Minimum Mantel Clearance
If you meet minimum clearance between
mantel shelf and top of fireplace opening, a
hood is not required (see Figure 6).
Determining Minimum Mantel Clearance
When Using a Hood
If minimum clearances in Figure 6, are not
met, you must have a hood. When using a
hood there are still certain minimum mantel
clearances required. Follow minimum clear-
ances shown in Figure 7, when using hood.
Mantel Shelf
10"
8"
6"
2 1 /2 "
(A)
12" 18" 20"
8" 8" 14"
Distances to
Minimum Non-
Underside of
Combustible
Mantel
Material Height
Without Using Hood
Mantel Shelf
12"
10"
8"
6"
2½"
8" 12" 15"
Min.
Hood
Distances to
(GA6050,
Underside of
GA6052 or
Mantel
GA6053)
When Using Hood
Underside of
Mantel Shelf
All minimum
distances are
in inches
Log Set
24"/30"/36"
22" 24"
Models
17" 20" 18" Model
Top of
Fireplace
Opening
Underside
of Mantel
Shelf
18" 20"
Top of
Fireplace
Opening
11