Ventilation And Combustion Air Requirements - Direct Vent; Ventilation And Combustion Air Requirements - Category Iv - IDEAL EXALT Solo 110 Installation & Maintenance Manual

CHAPTER 2 - COMBUSTION AIR & VENTING
2.2. Ventilation
Requirements - Direct Vent
A Direct Vent appliance utilizes uncontaminated
outdoor air piped directly to the appliance for
combustion.
For Direct Vent installations involving only the EXALT, in
which the minimum service clearances are maintained
as listed in Section 1.5 on page 3, no ventilation openings
are required, but may be necessary to equalize the air
pressure with the outside.
For Direct Vent installations involving only the EXALT,
in which the minimum service clearances are not
maintained as listed in Section 1.5 on page 3, the space
/ enclosure must provide two openings for ventilation.
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 EXALT shares the space
with air movers (exhaust fan, clothes dryers, fireplaces,
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 /
combustion 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 installations in Canada.
WARNING
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
EXALT, excluding the input of a Direct Vent EXALT
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.
6
and Combustion Air
2.3. Ventilation
Requirements - Category IV
A Category IV appliance utilizes uncontaminated
indoor or outdoor air surrounding the appliance for
combustion.
BEST PRACTICE BEST PRACTICE
In order to reduce the potential risks associated
with indoor contaminates (see list in Section
2.1 on page 5), 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 higher
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 EXALT shares the space with
air movers (exhaust fan, clothes dryers, fireplaces, 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 / combustion 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 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, including the EXALT when located in
the same space. Failure to provide or properly size
the openings can result in substantial property
damage, serious injury, or death.
and Combustion
WARNING
Air