10
PREPARING FOR INSTALLATION
Ventilation Air From Inside Building
This fresh air would come from adjoining
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provide two permanent openings: one
within 12 in. of the wall connecting
the two spaces (see options 1 and 2,
Fig. 4). You can also remove door into
adjoining room (see option 3, Fig. 4).
Follow the National Fuel Gas Code
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ventilation grills or ducts.
Ventilation Air From Outdoors
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grills or duct. You must provide two
permanent openings: one within 12 in. of
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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
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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
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Fig. 4 - Ventilation Air from
Inside Building
Fig. 5 - Ventilation Air from Outdoors
