16
Method 2 - When NOT using Method 1
With this method, the combustion air supply is provided by doing
all
of the following:
• Remove the left side combustion air cover plate
. The cover plate is on the lower left (as you face
the fireplace) side of the Vision Gas Fireplace.
• Within two feet of the cover plate,
cut a twenty square inch, or greater, opening in the wall. This
opening
must
be within the shaded area shown in Figure 6 and
must
be in the same room as the
Vision Gas Fireplace. Figure 6 shows the left and front opening areas.
If the opening is to be covered with a grille (not supplied), the grille must have a minimum free
opening of 20 square inches.
In all cases, the opening must be at the burner level.
• Allow air to flow freely
between your opening and the fireplace cabinet. The opening and the
cabinet do not have to be connected by ducting but air must be able to flow freely between the
opening and the cabinet. Any materials such as insulation which will impede this free flow of air
must be removed
.
If a combustion air supply is not implemented correctly, the life of Vision Gas Fireplace
components will be shortened.
Do not bring either outside air or air from another room or building level into the wall cavity. The
combustion air supply and the flame must be at the same air pressure. While it may be tempting
to design a combustion air supply which is connected to another room, or level, of your building,
this mistake will create drafts and air movements that cause erratic fireplace operation.
CAUTION