This appliance is for installation only in a solid-fuel burning masonry or UL127 factory-
built fireplace or in a listed ventless firebox enclosure. It has been design certified for
these installations. Exception: DO NOT install this appliance in a factory-built fireplace
that includes instructions stating that it has not been tested or should not be used with
unvented gas logs.
Use manufacturer's installation and clearance requirements as defined in their manual.
The LX Series unvented room heater may also be installed into a Ventless Firebox Enclosure for Gas Fired Decorative Type
Unvented Room Heaters per ANSI Z21.91(typically referred to as a "Universal Firebox"), as long as firebox hearth dimen-
sions meet the minimum hearth dimensions shown below.
14D9999
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Model
A
1/ 2
DLX18
17
"
1/ 2
DLX24
17
"
1/ 2
DLX28
24
"
Figure 2 - Minimum Hearth Dimensions
FIREPLACE AND HEARTH DIMENSIONS
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B
C
D
1
13
/
"
27"
17"
4
14"
29"
17"
14"
33"
17"
9