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12-02 9 34615 Rev G
NOVUS B-VENT INSTALLATION INSTRUCTIONS
Roof Pitch H (Min.) Ft.
Flat to 6/12 ................................................ 1.0
6/12 to 7/12 ............................................... 1.25
Over 7/12 to 8/12 ...................................... 1.5
Over 8/12 to 9/12 ...................................... 2.0
Over 9/12 to 10/12 .................................... 2.5
Over 10/12 to 11/12 .................................. 3.25
Over 11/12 to 12/12 .................................. 4.0
Over 12/12 to 14/12 .................................. 5.0
Over 14/12 to 16/12 .................................. 6.0
Over 16/12 to 18/12 .................................. 7.0
Over 18/12 to 20/12 .................................. 7.5
Over 20/12 to 21/12 .................................. 8.0
Figure 7
Vent Height for Vertical Termination
5. CHECK VENTING SYSTEM
Check the venting system to assure proper operation.
This can be done with a match while the appliance is
operating.
Hold a lighted match at the bottom edge of the draft hood
opening. If the flames and smoke remain upright,
ventilation is acceptable. If the flames and smoke are
drawn into the draft hood, this means ventilation is good.
If the flames and smoke are forced away from the draft
hood, this may indicate a ventilation blockage or down
draft resulting in gas spillage into the home. If this occurs,
turn off the appliance and do not burn it until it has been
inspected by a qualified service person. See Figure8.
Vent Height
6. INSTALLING AN OUTSIDE AIR KIT (STRONGLY
RECOMMENDED)
An outside air kit should be purchased as a feature
with this appliance. An outside air kit helps to decrease
the amount of room air taken by utilizing outside air for
combustion. Figure 9 illustrates two of many possible
methods that can be used to supply outside air to the
appliance.
A maximum of 40 of air kit ducting is allowed. The air
kit must terminate at least one foot below the venting
termination and must terminate to the outside.
Figure 8
Testing Ventilation
WARNING!
Exhaust products of gasoline engines are hazard-
ous. The outside air must not be taken from a ga-
rage space, attic spaces, basements or above the
roofing where other heating appliances, fans or
chimneys exhaust or utilize air.
TABLE 1
Note: The outside air kit can terminate at any level with
the exception that it must terminate at least one foot be-
low the vent termination cap. The outside air kit inlet
thimble should be positioned at least four feet above the
ground level in a manner that will not allow snow, leaves,
etc. to block the inlet.