USING OPTIONAL AK-4 OUTSIDE AIR KIT
COMBUSTION AIR
1.Locate combustion air assembly at an exterior location which is not likely to be accidentally blocked in any manner. Locate assembly a min. of 12" above the snow line to prevent blockage by snow accumulation.
2.Never mount the combustion air inlet assembly in a garage or storage area where combustible fumes such as gasoline might be drawn into the fireplace.
3.Combustion air can be drawn from the crawl space under a house when an adequate supply of air is provided by open ventilation.
4.CAUTION: Do not take combustion air from attic space or garage space.
5.Locate air supply inlet at least 3' away from any appliance vent terminal.
6.Avoid extremely long runs and numerous turns in the duct leading from the fireplace to the combustion air assembly. These conditions increase the resistance to the free flow of air through the duct. See Figures 17 through 20 for methods of installing the outside air for combustion assemblies.
Note: Fireplace model in illustrations may not be representative of your appliance. | Firestop Spacer |
Above
Snow
Level
Ground
Level
Basement
Wall
Inlet Grill in
8'max. Soffit
(Overhang) |
| Figure 18 - Concrete Slab Installation |
Figure 17 - Basement Installation | (Optional Outside Air Runs) |
Duct Extended
to Miss Joist
To Outside Wall
Inside Wall
Outside 
Wall
Figure 19 - Installation Above Basement or | Figure 20 - 45° Corner Installation on |
Crawl Space | Slab Floor |
|
|
16 | 26D4720 |
