Ventilation Air - Desa FVFM27NR/PR Owner's Operation And Installation Manual

FLAME-MAX
UNVENTED GAS LOG HEATER
AIR FOR
COMBUSTION AND
VENTILATION
Continued

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, ANSI Z223.1/NFPA 54, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma-
nent 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, ANSI Z223.1/NFPA 54, 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.
For more information, visit www.desatech.com
®
Ventilation
Grills
Into Adjoining
Room,
Option 1
Figure 2 - Ventilation Air from Inside Building
Outlet
Air
Inlet
Air
Figure 3 - Ventilation Air from Outdoors
Into Adjoining Room,
Or
Remove
Door into
Adjoining
Room,
Option
3
12"
Ventilated
Outlet
Attic
Air
Inlet Air
6
12"
Ventilation Grills
Option 2
To Attic
To
Crawl
Space
Ventilated
Crawl Space
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