8
Combustion Air and Venting
Ventilation Air Requirements
For installations, involving only the CHAL-
LENGER, in which the minimum service
clearances are maintained as listed on page 5,
no ventilation openings are required.
For installations with less than the minimum
service clearances involving only the CHAL-
LENGER, the space / enclosure must provide
two openings for ventilation. The openings
must be sized to provide 1 square inch [6
square centimeters] of free area per 1,000
BTUH [0.3 Kw] of appliance input. The open-
ings shall be placed 12 inches [30.5 cm] from
the top of the space and 12 inches [30.5 cm]
from the floor of the space.
For installations in which the CHALLENGER
shares the space with air movers (exhaust fan,
clothes dryers, fireplaces, etc.) and other com-
bustion equipment (gas or oil) the space must
be provided with adequate air openings to pro-
vide 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 venti-
lation / combustion air openings proper-
ly 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 CHAL-
LENGER. The input of a CHAL-
LENGER which uses combustion air
directly from the outside, is excluded
thus additional free area for the open-
ings is not required. Failure to provide
or properly size the openings could
result in severe personal injury, death or
substantial property damage.
Combustion Air and Vent Piping
The CHALLENGER requires a Category IV
venting system, which is designed for pressur-
ized venting and condensate.
The CHALLENGER is certified as Direct Vent
(sealed combustion) appliance. A Direct Vent
appliance utilizes uncontaminated outdoor air
(piped directly to the appliance) for combustion.
Install combustion air and vent pipe as
detailed in the CHALLENGER
Concentric Vent/Air System
Supplement 2010-23 included in the
appliance installation envelope. Refer to
instructions for parts list and method of
installation.
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.
WARNING
NOTICE
DANGER
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