Outside Combustion Air - Vermont Castings VFF32LI Installation & Operating Instructions Manual

OUTSIDE COMBUSTION AIR

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 un-
der 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.
Figure 60 -
Basement Installation
FP2459
OA basement install
Inlet Grille in
Soffit
8' Max.
(Overhang)
Figure 61 -
Concrete Slab Installation
(Optional Outside Air runs)
FP2460
OA slab install
20308184
5. Locate air supply inlet at least 3' away from any appli-
ance 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
60 through 63 for methods of installing the outside air
for combustion assemblies.
Duct Extended
to Miss Joint
Figure 62 -
Installation Above Basement or Crawl Space
FP2459
Outside
Wall
FP2460
Figure 63 -
45° Corner Installation on Slab Floor
VFF Vent Free Fireplace System
FP2461
above basement
Inside
Wall
FP2462
OA corner install
FP2461
FP2462
37