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CGNIOTA
and
CGNIOTLA
VENT-FREE
NATURAL
GAS
HEATER
AIR FOR
COMBUSTION
AND
VENTILATION
Contmued
VENTILATION
AIR
Ventilation Air From Inside
Building
This fresh air would come from an adjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must pro-
vide two permanent openings: one within
12" of the ceiling and one within 12" of the
floor on the wall connecting the two spaces
(see options 1 and 2, Figure 2). You can also
remove door into adjoining room (see op-
tion 3, Figure 2). Follow the National Fuel
Gas Code NFPA 54/ANSI Z223.1, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
,_
WARNING:
Rework
work-
sheet, adding the space of the
adjoining unconfined
space. The
combined
spaces
must
have
enough
fresh air to supply all
appliances
in both spaces.
Ventilation
Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connect these items direcdy to the outdoors
or spaces open to the outdoors. These spaces
include attics and crawl spaces. Follow the
National Fuel Gas Code NFPA 541ANSI
7-223.1, Section 5.3, Air for Combustionand
Ventilation for required size of ventilation
grills or ducts.
IMPORTANT:
Do not provide openings
for inlet or outlet air into attic if attic has a
thermostat-cootxolled power vent. Heated
air entering the attic will activate the power
vent.
Ventilation
Grills
into Adjoining
Room,
Option 1
Or
Remove
Door into
Adjoinirxo
Room,
Option 3
12
A
12"
VentilationGrills
Into AdjoiningRoom,
Option 2
Figure 2 - Ventilation Air from Inside Building
Outlet
Air
Inlet
Air
To Attic
Inlet Air
To
mm_
Crawl
[]
Space
Ventilated
B
Crawl Space
Figure 3 - Ventilation Air from Outdoors
6
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