Page 23
31-5000727 Rev. 0
AIR
INTAKE
SCREEN
(Provided)
NOTE
- Air intake screen and elbow may be rotated, so that
screen may be positioned to face forward or to either side.
Figure 18. Typical Air Intake Pipe Connections
Non−Direct Vent Applications
Ventilation Louvers
Inlet Air
(Minimum 12 in.
(305mm) above
Attic Floor)
Roof Terminated
Exhaust Pipe
Furnace
*Intake Debris
Screen
(Provided)
* See Maximum Vent Lengths table
NOTE-The inlet and outlet air openings shall each have a
free area of at least one square inch per 4,000 Btu (645mm
2
per 1.17kW) per hour of the total input rating of all equipment
in the enclosure.
Figure 19.
Equipment in Confined Space
(Inlet Air from Ventilated Attic and Outlet Air to
Outside)
Vent Piping Guidelines
NOTE:
GE Appliances has approved the use of DuraVent
®
and Centrotherm manufactured vent pipe and terminations
as an option to PVC. When using the PolyPro
®
by DuraVent
or InnoFlue
®
by Centrotherm venting system the vent pipe
requirements stated in the unit installation instruction
– minimum & maximum vent lengths, termination
clearances, etc. – apply and must be followed. Follow
the instructions provided with PoyPro by DuraVent and
InnoFlue by Centrotherm venting system for assembly
or if requirements are more restrictive. The PolyPro by
Duravent and InnoFlue by Centrotherm venting system
must also follow the uninsulated and unconditioned space
criteria listed in Table 11.
The NF96DV can be installed as either a Non-Direct
Vent or a Direct Vent gas central furnace.
NOTE:
In Non-Direct Vent installations, combustion air
is taken from indoors or ventilated attic or crawlspace
and flue gases are discharged outdoors. In Direct Vent
installations, combustion air is taken from outdoors and
flue gases are discharged outdoors.
Intake and exhaust pipe sizing --
Size pipe according to
Table 9 and Table 10A through Table 10C. Count all elbows
inside and outside the home. Table 9 lists the minimum
vent pipe lengths permitted. Table 10A through Table 10C
lists the maximum pipe lengths permitted.
Roof Terminated
Exhaust Pipe
Furnace
Ventilation
Louvers
(Crawl Space)
*Intake Debris Screen Provided
Inlet Air
Minimum
12 in. (305mm)
above Crawl
Space Floor
Coupling or
3 in. to 2 in.
Transition
(Field Provided)
* See Maximum Vent Lengths table
NOTE-The inlet and outlet air openings shall each have a
free area of at least one square inch per 4,000 Btu (645mm
2
per 1.17kW) per hour of the total input rating of all equipment
in the enclosure.
Figure 17.
Equipment in Confined Space
(Inlet Air from Ventilated Crawl Space and Outlet Air
to Outside)
Summary of Contents for GE NF96DV
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