Vanguard VN1800C Owner's Operation And Installation Manual page 7

FRESH AIR
FOR
COMBUSTION
AND
VENTILATION
Continued
100750
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 2). You can also remove door into adjoining room (see option 3, Figure 2).
Rework worksheet, 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
Or
into Adjoining
Remove
Room,
Door into
Option 1
Adjoining
Room,
Option 3
Figure 2 - Ventilation Air from Inside Building
WARNING
WARNING ICON G 001
Ventilation Grills
Into Adjoining Room,
Option 2
12"
12"
Continued
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