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440 01 2021 01
Figure 26
Sidewall Inlet Vent and Exhaust--Air
Termination with Exterior Risers
Exhaust
8²
²²
² Min.
8²
²²
² Min.
20¢
¢¢
¢ Max.
18²
²²
² Min. for Cold Climates
(SustainedBelow 0°
°°
° F)
Inlet
“A”
“A”
Dimension “A” is touching or 2² maximum separation.
12²
²²
² Min.
Grade or
Snow Level
Figure 27
Rooftop Inlet Vent and Exhaust--Air
Termination
12²
²²
² Min.
Grade or Snow
Level
Exhaust
8²
²²
² Min.
20¢
¢¢
¢ Max.
25--22--43
18²
²²
² Min. for Cold Climates
(SustainedBelow 0°
°°
° F)
Inlet
Figure 28
Recommended Alternate Installation
for Sustained Cold Weather
(--0°
°°
° F&below)
OVERHANG
12²
²²
² MIN. Ground Level
OR Snow Level
INLET
EXHAUST
90°
°°
°
SameJoist
Space
FRONT VIEW
SIDE VIEW
25-23-73
12²
²²
² MIN.
12²
²²
² MIN.
5. Concentric Vent Termination
Vent Termination Clearances
CARBON MONOXIDE POISONING, FIRE AND
EXPLOSION HAZARD.
Failure to properly vent this furnace could result in
death, personal injury and/or property damage.
Inlet and outlet pipes may NOT be vented directly
above each other (standard vent terminals).
!
WARNING
1. Determine termination locations based on clearances spe-
cified in following steps and as shown in Figure 7,
Figure 29 through Figure 34.
2. The vent termination must be located at least 12² above
ground or normally expected snow accumulation levels.
3. Do NOT terminate over public walkways. Avoid areas
where condensate may cause problems such as above
planters, patios, or adjacent to windows where steam may
cause fogging.
4. The v ent termination shall be located at least 4¢ horizontally
from any electric meter, gas meter, gas regulator, and any
relief equipment. These distances apply ONLY to U.S.
installations.
5. The vent termination is to be located at least 3¢ above any
forced air inlet located within 10¢ ; and at least 10¢ from a
combustion air intake of another appliance, except another
direct vent furnace intake.
6. In Canada, the CanadianFuelGasCodetakes precedence
over the preceding termination instructions.
Concentric Vent Termination - Kit #
NAHA001CV & NAHA002CV
These kits are for vertical or horizontal termination of the combus-
tion air inlet and the exhaust vent pipes on Category IVgas--fired
condensing furnaces. The NAHA001CV kit can be used for 3² di-
ameter pipe systems. The NAHA002CV kit can be used for 2² di-
ameter pipe system. Refer to Table 5 for the correct pipe size for
the furnace. Both the combustion air inlet and the exhaust vent
pipes must attach to the termination kit. The termination k it must
terminate outside the structure and must be installed per the in-
structions outlined below for vertical or horizontal termination. Ver-
tical termination is preferred. Field supplied pipe and fittings are
required to complete the installation.
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