17
79D0004
Lo-Rider Designer Vent Free Fireboxes
use of 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 block-
age by snow accumulation.
2. Never mount the combustion air inlet assembly in a garage or storage area where combus-
tible 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 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.
Refer to Figures 22 through 25
for methods of installing the outside air for
combustion assemblies.
Figure 22 -
Basement Installation
Figure 23 -
Concrete Slab Installation
(Optional Outside Air Runs)
Above
Snow
level
ground
level
Basement
wall
Inlet grill in
Soffit
(Overhang)
Figure 25 -
45° Corner Installation on Slab Floor
Figure 24 -
Installation Above Basement or Crawl Space
Inside wall
Outside
wall
Duct Extended
to Miss joist
To Outside wall
Note: Fireplace model in illustrations may not be representative of your appliance.
8'max.