Clearances
All Heaters
For clearances from combustible surfaces, see Table A below. We require a minimal vertical clearance of three feet between the upper surface of the flue outlet to a noncombustible material.
Indoor Heaters | Outdoor Heaters | ||
| |||
Heater | Clearance | Heater | Clearance |
Side | (Inches) | Side | (Inches) |
Top | 24 | Top | 24 |
Back | 24 | Back | 24 |
Right Side | 24 | Right Side | 24 |
Left Side | 24 | Left Side | 24 |
Vent* | 6 |
|
|
*Vent includes factory supplied drafthood and does not include field supplied vent systems above the drafthood. On Models
For servicing provide a front clearance as shown below: Model
Model
Table A: Minimum Clearances from Combustible
Construction
For servicing, provide at least 24" in front of the heater on Models
Outdoor Heaters (Models
These heaters are design certified for outdoor installa- tion, when equipped with the approved top designated for outdoor use. 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 heaters installed under overhangs with the use of gutters.
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.
6
Fig. 2: Minimum Distance from Openings
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, win- dow 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.
High Wind Conditions
(Outdoor Units Only)
In areas where high winds are frequent, it may be nec- essary to locate the heater a minimum of 3' from high vertical walls, or install a wind break so the heater is not in direct wind current.
Indoor Heaters
The design is also certified for indoor installation when equipped with approved drafthood. Locate heater as close as practical to a chimney or gas vent.
Combustion Air
(Indoor Units Only)
The heater must have both combustion and ventilation air. Openings must not be obstructed. Minimum requirements are as follows:
CAUTION: Combustion air must not be contaminated by corrosive chemical fumes which can damage the heater and void the warranty.
1.Free combustion air 1 sq. in. per 1000 BTU input within 12" of the floor.
