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CLEARANCES
ALL HEATERS
For clearances from combustible surfaces, see
chart below.
Clearances from Combustible construction.
Indoor Installation:
Top* (Drafthood) - 30"; Vent - 6";
Back - 5"; Right Side - 6";
Left Side - 6"; Floor - 0.
Outdoor Installation:
Top* (Stackless Top) -
unobstructed; Back - 5"; Sides - 6".
* Clearance from Top of Vent Terminal
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 delime the heat
exchanger.
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:
The point from where the flue products exit the heater must be a minimum of four (4) feet below, four (4) feet
horizontally from or one (1) foot above any door, window or gravity inlet to a building. The top surface of the heater
shall be at least three (3) feet above any forced air inlet, or intake ducts located within ten (10) feet horizontally.
Forced Air Inlet
4
Minimum
4
foot
Minimum
3
foot
Minimum
10
foot
Minimum
OUTDOOR HEATERS
These heaters are design certified for outdoor
installation, when equipped with the approved top des-
ignated for outdoor use.
WARNING: The heater shall not be located in an area
where water sprinklers, or other devices, may cause
water to spray through the cabinet louvers and into the
heater. This could cause heavy internal rusting or
damage some electrical components, and this would
void the warranty.
Heater with outdoor top
foot
4
Minimum
1
Minimum
10
Fig # 9259
foot
foot
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