12
Indoor Installation
For servicing, provide at least 24" in front of the heater
for burner tray removal, and at least 18" on the left side
of the heater to inspect and de-lime the heat exchang-
er.
Heater Side
Min. Clearance from
Combustible Surfaces
Top* (Drafthood)
35”
Vent
6”
Back
2”
Right Side
6”
Left Side
6”
Floor
0
U.S. Installation Only
4
foot
Minimum
4
foot
Minimum
1
foot
Minimum
4
foot
Minimum
3
foot
Minimum
10
foot
Minimum
Forced Air Inlet
*Clearance from Top of Vent Terminal
Outdoor Installation
For servicing, provide at least 24" in front of the heater
for burner tray removal, and at least 18" on the left side
of the heater to inspect and de-lime the heat exchang-
er.
Heaters must not be installed under an overhang of
less than three (3) feet from the top of the heater.
Three (3) sides must be open in the area under the
overhang. Roof water drainage must be diverted away
from the heaters installed under overhangs with the
use of gutters. For U.S. installations, the point from
where the flue products exit the heater must be a min-
imum of four (4) feet below, four (4) feet horizontally
Heater Side
Min. Clearance from
Combustible Surfaces
Top* (Stackless Top)
Unobstructed
Back
2”
Right Side
6”
Left Side
6”
*Clearance from Top of Vent Terminal
Table B: Clearances from Combustible Construction
Table C: Clearances from Combustible Construction
Fig. 4: Outdoor Installation
