9
Combustion Air and Venting
Combination of Indoor and Outdoor
Combustion Air
Indoor Openings: Where used, openings con-
necting the interior spaces shall comply with
the Indoor Combustion Air section on page 7.
Outdoor Opening(s) Location. Outdoor open-
ing(s) shall be located in accordance with the
Outdoor Combustion Air section.
Outdoor Opening(s) Size. Outdoor opening(s) shall
be calculated in accordance with the following:
- The ratio of the interior spaces shall be
the available volume of all communi-
cating spaces divided by the required
volume.
- The outdoor size reduction factor shall
be 1 minus the ratio of interior spaces.
- The minimum size of outdoor open-
ing(s) calculated in accordance with the
above outdoor air section multiplied by
the reduction factor. The minimum
dimension of air openings shall not be
less than 3 in.
Do not install the PRESTIGE Excellence
into a common vent with other gas or oil
appliances. This may cause flue gas
spillage or appliance malfunction, result-
ing in possible severe personal injury,
death or substantial property damage.
Combustion Air and Vent Piping
The PRESTIGE Excellence requires a
Category IV venting system, which is designed
for pressurized venting and condensate.
The PRESTIGE Excellence is certified per
ANSI Z21.13 as a Category IV or Direct Vent
(sealed combustion) appliance. A Category IV
appliance utilizes uncontaminated indoor or
outdoor air (surrounding the appliance) for
combustion. A Direct Vent appliance utilizes
uncontaminated outdoor air (piped directly to
the appliance) for combustion.
In order to reduce the potential risks
associated with indoor contaminates
(listed on page 5), flammable vapors and
tight housing construction (little or no
infiltration air), it is recommended to
pipe uncontaminated combustion air
directly from the outdoors to the appli-
ance. This practice also promotes higher
system efficiency by reducing heated
indoor air from being exhausted from
the house and replaced by cold infiltra-
tion air into the house.
Install combustion air and vent pipe as
detailed in the PRESTIGE Vent
Supplement included in the boiler installa-
tion envelope. Refer to optional vent kit
instructions for addition vent installation
instructions.
Verify installed combustion air and vent
piping are sealed gas tight and meet all
provided instructions and applicable
codes, failure to comply will result in
severe personal injury of death.
NOTICE
BEST PRACTICE
DANGER
DANGER
