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Fig. 7: Minimum Installed Service Clearances — Indoor/Closet Installations
The heater must be installed in a manner that will
enable the heater to be serviced without removing any
structure around the heater.
Outdoor Installations
These heaters are design-certified for outdoor installa-
tion. Heaters must not be installed under an overhang
unless clearances are in accordance with local instal-
lation codes and the requirements of the gas supplier.
Three sides must be open in the area under the over-
Table D: Clearances — Outdoor Installations
Fig. 8: Minimum Installed Service Clearance — Outdoor Installations
hang. Roof water drainage must be diverted away
from heaters installed under overhangs.
10
Heater Side
Minimum Installed
Service Clearance
Front 24”
Rear 12”
Top Unobstructed
Other Side 36”
Water Side 36”
CAUTION: Service clearances less than the
minimums may require removal of the heater to
service either the heat exchanger or the burners.