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6
*Standard Fireplace Hood
with a minimum 4 inch
horizontal projection
Horizontal projection from face of fireplace
Non combustible or heat resistant material (gypsum
board, marble, sheet rock, slate, tile etc.)
8” Minimum from top of firebox opening
10”
8”
6”
2.5”
.75”
30”+
28”-30”
12”-20”
10”
8”
6”
2.5”
1.5”
10-12”
When operated as a Vent Free Heater, the minimum clearances from the fireplace opening to combustible materials
must be maintained as outlined below .
VENT FREE APPLICATIONS ● MINIMUM CLEARANCES TO COMBUSTIBLES
MANTEL CLEARANCE WITHOUT HOOD
MANTEL CLEARANCE WITH HOOD
IF YOU CANNOT MEET THESE MINIMUM CLEARANCES YOU MUST OPERATE THE APPLIANCE AS A VENTED
APPLIANCE WITH CHIMNEY FLUE DAMPER OPEN. (See notes regarding vented installation on following page)
0-12" 0"
12"-20" 3/4"
20"-25" 2 1/2"
25"-28" 6"
28"-30" 8"
30" plus 10"
Height Above
Opening
Projection Out
From Face
42”
15 1/2”
MINIMUM CLEARANCES TO SIDE WALL AND CEILING
Side wall: 15 1/2" from side of fireplace opening.
Ceiling: 42" from top of fireplace opening.
NOTE:
Clearances to Combustible Construction are those
distances required to ensure that a fireplace mantel or
facing will not catch fire. In most cases they should also
be adequate to prevent any discoloration or warping due
to heat. However, each and every decorative gas appli-
ance installation (ALTERNA™ included) presents a dif-
ferent and completely unique set of circumstances involv-
ing many variables beyond the control of the manufac-
turer. These include paint or finish composition, previous
exposure to heat, methods and quality of construction, air
flow patterns, glass doors, fans or blowers, etc. Because
of these variables, we cannot guarantee that heat warping
or discoloration will never occur. The potential for heat
warping or discoloration may exist whether you are burn-
ing an ALTERNA™, some other manufacturer's decora-
tive gas appliance or even wood.
Distances from Top of
Firebox Opening to Underside
of Mantel
Horizontal projection from face of fireplace
A fireplace hood deflects heat away from the fireplace face and mantel, reducing the potential for heat related warping or discoloration.
The use of a fireplace hood is highly recommended.*
0-10" 0"
10"-12" 1 1/2"
12"-15" 2 1/2"
15"-17" 6"
17"-20" 8"
20" plus 10"
Height Above
Opening
Horizontal
Projection From
Face of
Fireplace
Distances from Top of
Firebox Opening to Underside
of Mantel
17”-20”
20”+
15”-17”
12”-15”
20”-25”
25”-28”
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