Comfort Glow CGF265NV Owner's Operation And Installation Manual page 8

AIR FOR
COMBUSTION
AND
VENTILATION
Continued
8
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 provide 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 3). 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. You can also remove door into adjoining room (see option 3, Figure 3).
Re-calculate 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
Grills
Into Adjoining
Or
Room,
Remove
Option 1
Door into
Adjoining
Room,
Option
3
Figure 3 - Ventilation Air from Inside Building
Ventilation Air from Outdoors
Provide extra fresh air by using ventilation grills or ducts. You must provide two
permanent openings: one within 12" of the ceiling and one within 12" of the floor.
Connect these items directly to the outdoors or spaces open to the outdoors. These
spaces include attics and crawl spaces. 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. IMPORTANT: Do not provide openings for inlet or outlet air
into attic if attic has a thermostat-controlled power vent. Heated air entering the attic
will activate the power vent.
Outlet
Air
Inlet
Air
Figure 4 - Ventilation Air from Outdoors
WARNING
WARNING ICON G 001
12"
Ventilation Grills
Into Adjoining Room,
Option 2
12"
Ventilated
Outlet
Attic
Air
Ventilated
Inlet Air
Crawl Space
To Attic
To
Crawl
Space
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