--
I
~
Non-direct venting location
requirements are slightly different in
some cases than direct venting.
Install a non-direct vent with the
following minimum clearances. See
Figure 35.
1.
Locate the termination 12 inches
or more above grade level.
2.
Do not terminate the vent over a
public walkway or over an area
where condensate or vapor
could create a nuisance or
hazard.
3.
Terminate 4 feet below, 4 feet
horizontally from, or 1 foot
above any door, window, soffit,
under eave vent, or gravity air
inlet to the building.
4.
Terminate 6 feet from an inside
corner formed by two exterior
walls. Ten feet is the
recommended distance.
5.
Terminate 4 feet below, 4 feet
horizontally from any gas or
electric meters.
6.
Locate the termination ten feet
from and three feet above any
forced air inlet to the building.
Any fresh air or make up air
inlet, such as for an electric
clothes drier or furnace area, is
considered a forced air inlet.
7. Avoid areas where dripping
condensate may cause
problems such as above
planters, patios, or adjacent to
windows where steam may
cause fogging.
FIGURE 35
In addition to the minimum
clearances listed above, the vent
location should also be governed by
the following guidelines.
1. Do not terminate under any
kind of patio or deck. If
running the vent under a
deck, insulate It to insure no
condensate freezes and
blocks the pipe.
2.
Do not locate on the side of a
building with prevailing winter
winds. This prevents moisture
from freezing on walls and
under eaves.
3.
Do not extend the vent directly
through brick or masonry
surfaces. Use a rust resistant
sheet metal or plastic backing
plate behind the vent.
4. Do not locate the vent too close
to shrubs as condensate may
stunt or kill them.
5. Minimum vertical clearances of
1 foot are recommended for
overhangs up to 1 foot
horizontal. The vertical
clearance should be increased
equally for each additional
increase in horizontal overhang
to a maximum vertical clearance
of 6 feet.
6. Caulk all cracks, seams and
joints within 6 feet horizontally
and above and below the
vent.
7. Do not terminate behind any
area that may allow flue gases
to stagnate.
NON-DIRECT VENT TERMINATION CLEARANCES
VENTS
----6':}10' RECOMMENDED
4
,_.__ ____ ..,,
ELECTRIC
o-
4
,
METER ------~~---
!
INSIDE
12
•
CORNER
MIN.
4'----,,
3' FRESH
AIR
INTAKE
---UPTO 10' •-~--
• NOTE: FOR DISTANCES OVER 10' NO
VERTICAL RESTRICTIONS
APPLY.
DIRECT VENT FURNACE
INSTALLATIONS
(TWO PIPE)
A dedicated vent system has all
combustion products discharged
directly to the outdoors. All
combustion air is taken from the
outdoors.
COMBUSTION AIR
If installed as a direct vent forced air
furnace, THE COMBUSTION AIR
SYSTEM DESIGNED FOR THIS
FURNACE MUST BE USED. All
combustion air must be supplied
directly to the burner through a
special air intake system. This
system consists of field supplied
schedule 40 or 26 SOR PVC pipe
and one of the following vent
termination kits: RXGY - 002,
RXGY - D03, RXGY - D04,
RXGY • C01 or RXGY - E02.
NOTE: Schedule 40 ABS DWV pipe
and fittings may be used as an
alternate to PVC for the combustion
air inlet and vent pipes.
Combustion air for this furnace is
supplied directly from the outdoors
through the combustion air inlet
system. If the furnace is installed in a
confined space, such as a utility
room or closet, maintain 2 inches of
space to the front of the furnace.
If the furnace is installed in the same
space with other gas appliances,
such as a water heater, there
MUST be an adequate supply of
combustion and ventilation air for all
appliances. Do not delete or reduce
the combustion air supply required
by the other gas appliances in the
space. See Z223.1, National Fuel
Gas Code (NFPA-54) or CAN/CGA
8149.1 and .2 for determining the
combustion air requirements.
An unconfined space must have at
least 50 cubic feet (volume) for
each 1,000 BTUH of the total input
of all appliances in the space.
If the open space containing the
appliances is in a building with
tight construction (contemporary
construction), outside air may still be
required for the other appliances to
burn and vent properly. Outside air
openings should be sized to the
same specifications as for a confined
space.
35
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