Desa CGP20B Owner's Operation And Installation Manual page 6

BLUE-FLAME
VENT-FREE PROPANE/LP GAS 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 page 5). You
can also remove door into adjoining room
(see option 3, Figure 2). Follow the National
Fuel Gas Code NFPA 54/ANS Z223.1, Sec-
tion 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 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/ANS
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.
Ventilation
Grills
Or
into Adjoining Remove
Room,
Door into
Option 1
Adjoining
Room,
Option 3
Figure 2 - Ventilation Air from Inside Building
Outlet
Air
Outlet
Air
Inlet
Air
Inlet Air
Figure 3 - Ventilation Air from Outdoors
6
12"
Ventilation Grills
Into Adjoining Room,
Option 2
12"
Ventilated
Attic
To Attic
Crawl
Space
Ventilated
Crawl Space
To
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