4
CHAPTER
2
CHAPTER 2 - COMBUSTION AIR & VENTING
2.2. Ventilation and Combustion Air Require-
ments - Direct Vent
A Direct Vent appliance utilizes uncontaminated out-
door air piped directly to the appliance for combustion.
For Direct Vent installations involving only the PRES-
TIGE Solo, in which the minimum service clearances are
maintained as listed in
Section 1.5 on page 2
, no
ventilation openings are required, but may be neces-
sary to equalize the air pressure with the outside.
For Direct Vent installations involving only the PRESTIGE
Solo, in which the minimum service clearances are not
maintained as listed in
Section 1.5 on page 2
, the
space / enclosure must provide two openings for venti-
lation. The openings must be sized to provide 1 square
inch of free area per 1,000 BTUH of boiler input. The
openings shall be placed 12 inches from the top of the
space and 12 inches from the floor of the space.
For installations in which the PRESTIGE Solo shares the
space with air movers (exhaust fan, clothes dryers, fire-
places, etc.) and other combustion equipment (gas
or oil) the space must be provided with adequate air
openings to provide ventilation and combustion air to
the equipment. To properly size the ventilation / com-
bustion air openings, the installer must comply with the
National Fuel Gas Code (NFPA 54 / ANSI Z223.1) for in-
stallations in the U.S. or CAN/CSA B149.1 for installations
in Canada.
The space must be provided with ventilation
/ combustion air openings properly sized for
all make-up air requirements (exhaust fans,
clothes dryers, fireplaces, etc.) and the total
input of all appliances located in the same
space as the PRESTIGE Solo, excluding the in-
put of a Direct Vent PRESTIGE Solo which uses
combustion air directly from the outside,
thus additional free area for the openings is
not required. Failure to provide or properly
size the openings can result in substantial
property damage, serious injury, or death.
WARNING
2.3. Ventilation and Combustion Air Require-
ments - Category IV
A Category IV appliance utilizes uncontaminated indoor
or outdoor air surrounding the appliance for combus-
tion.
In order to reduce the potential risks associated
with indoor contaminates (see list in Section
2.1 on page 3), flammable vapors and tight
housing construction with little or no infiltration
air, it is recommended to pipe uncontaminated
combustion air directly from the outdoors to
the appliance. This practice also promotes high-
er system efficiency by reducing heated indoor
air from being exhausted from the house and
replaced by cold infiltration air into the house.
For installations in which the PRESTIGE Solo shares the
space with air movers (exhaust fan, clothes dryers, fire-
places, etc.) and other combustion equipment (gas
or oil) the space must be provided with adequate air
openings to provide ventilation and combustion air to
the equipment. To properly size the ventilation / com-
bustion air openings, the installer must comply with
the National Fuel Gas Code (NFPA 54 / ANSI Z223.1) for
installations in the U.S. or CAN/ CSA B149.1 for installa-
tions in Canada.
The space must be provided with ventilation
/ combustion air openings properly sized for
all make-up air requirements (exhaust fans,
clothes dryers, fireplaces, etc.) and the total
input of all appliances, including the PRES-
TIGE Solo when located in the same space.
Failure to provide or properly size the open-
ings can result in substantial property dam-
age, serious injury, or death.
BEST PRACTICE
WARNING
Summary of Contents for PRESTIGE Solo PA 110
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