General Installation Information
Figure 1. Example of large room with 1/2 wall
divider.
The following formula can be used to determine the maximum heater
rating per the definition of confined space:
BTU/HR= (L
1
+
L
2
) FT X (W)FT X (H)FT X 1000
50
Example: Refer to Figure 1. Two (2) connecting rooms with and open
area between , with the following dimensions.
L
1
= 15
1/2
L
2
= 12 ’
W = 12 ’
H = 8 ’
(15
1/2 +
12 ) x (12) x (8) x 1000 = 52800 btu./hr
50
If there was a door between the two rooms the calculation would be based
only on the room with the heater.
(15
1/2
) x (12) x (8) x 1000 = 27760 btu./hr
50
Figure 2. Sidewall
and Ceiling Clearances.
The dimensions shown in Figure 2 and defined in the fireplace manufacturer’s instructions are minimum
clearances to maintain in installing this heater. Left and right clearances are determined when facing the
front of the heater.
When heater is installed into a unvented firebox, minimum clearances as specified by the unvented fire-
box manufacturer must be met.
Follow these instructions carefully to ensure safe installation. Failure to follow instructions exactly can
create a fire hazard.
W
A
R
N
IN
G
Sidewall and ceiling clearances
The sides of the fireplace opening must be at least 16” from any combustible wall. The ceiling must be at
least 42” from the top of the fireplace opening.
Left Side
Front
Right Side
L2
L1
H
W
Counter
Fireplace
42"
16"
16"
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