W415-0594 / C / 08.23.11
12
An acceptable 54" x 20" non-combustible (i.e. brick, stone or ce-
ramic tile) hearth extension must be installed.
The hearth must extend a minimum 20" in front of the appliance
although if raised a minimum of 6 1/2" the 20" may be reduced to a
minimum of 18".
The hearth must extend a minimum of 6" to both sides of the appli-
ance (54").
The hearth must be a minimum of 1" thick cement board (or equiva-
lent) plus ¼" ceramic tile.
Ensure that the gap between the appliance and a non-combustible
hearth extension is sealed with sand/cement grout or covered with
an ember strip (or both) to prevent sparks and embers from falling
into this area.
Raised hearths must be constructed of non-combustible materials
such as cement blocks or bricks.
While the appliance can be installed directly on the fl oor, a non-combustible hearth extension is required in
front of the appliance, that must not be built higher than the bottom of the appliance faceplate. It may therefore
be advisable to build the appliance on a raised platform.
A raised hearth together with the appliance built on a raised platform is recommended for easier wood loading and
fi re viewing.
EMBER STRIP
(See “HEARTH
EXAMPLES” Section)
HEARTH EXTENSIONS ARE TO BE INSTALLED ONLY AS DESCRIBED TO PREVENT HIGH
TEMPERATURES FROM OCCURRING ON CONCEALED COMBUSTIBLE MATERIALS. HEARTH
EMBER STRIPS PREVENT BURNING OR HOT PARTICLES FROM INADVERTENTLY FALLING
DIRECTLY ON COMBUSTIBLE SURFACES IN THE EVENT THE BUILDING SHOULD SETTLE AND
DISTURB THE ORIGINAL CONSTRUCTION.
0
2 (4)
4 (8)
6 (12)
8 (16)
10 (20)
5
(10)
10
(20)
15
(30)
20
(40)
25
(50)
AIR INTAKE LINERS
HORIZONTAL RUN
VER
TICAL
RISE
Included with the appliance are:
- Two 10' lengths of vent. Use a connector and seal if adding
more length.
- Two of intake hoods.
The vertical height of the air intake liner must not be greater than 2/3
the height of the chimney.
If additional liner length is required, it may be
doubled by increasing the size from 6" diameter to 8" diameter. Use a 6" to
8" increaser at the hood and a decreaser at the appliance. Values in brackets
represent 8" diameter intake liners.
The duct terminations must be located so they can not be blocked (i.e. snowdrifts). 4' above grade is recom-
mended. Make a 6 ½" inch hole to suit in an outside wall of the house. From outside, place the fresh air hood
into the hole, open side down. Seal with caulking and secure.
Horizontal run may be:
5'
15'
20'
25'
Vertical rise is between:
6' & 10' max
3' & 6'
1' & 3'
0' & 1'
3.3 FLOOR
PROTECTION
3.3.1 EMBER STRIP AND HEARTH EXTENSIONS