Instinct Installation Manual

CHAPTER 2 - COMBUSTION AIR & VENTING
6
WARNING
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 high-
er system efficiency by reducing heated indoor
air from being exhausted from the house and
replaced by cold infiltration air into the house.
WARNING
2.2. Ventilation and Combustion Air
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
INSTINCT, 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
INSTINCT, 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 INSTINCT 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
2.3. Ventilation and Combustion Air
Requirements - Category IV
A Category IV appliance utilizes uncontaminated
indoor or outdoor air surrounding the appliance for
combustion.
For installations in which the INSTINCT 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 sizedfor
total input of all appliances located in the
same space as the INSTINCT, excluding the
input of a Direct Vent INSTINCT 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.
all make-up air requirements (exhaust
fans, clothes dryers, fireplaces, etc.) and
the total input of all appliances, including
the INSTINCT when located in the same
space. Failure to provide or properly size the
openings can result in substantial property
damage, serious injury, or death.
CHAPTER 2