Giant
Manual
13
Combus
Ɵ
on Air Requirements
This
water
heater
requires
adequate
combus on
air
for
ven la on
and
dilu on
of
fl
ue
gases.
Failure
to
provide
adequate
combus on
air
can
result
in
unit
failure,
fi
re,
explosion,
serious
bodily
injury
or
death.
Use
the
following
methods
to
ensure
adequate
combus on
air
is
available
for
correct
and
safe
opera on
of
this
water
heater.
Important:
Combus on
air
must
be
free
of
corrosive
chemicals.
Do
not
provide
combus on
air
from
corrosive
environments.
Appliance
failure
due
to
corrosive
air
is
not
covered
by
warranty.
Combus on
air
must
be
free
of
acid
forming
chemical
such
as
sulfur,
fl
uorine
and
chlorine.
These
chemicals
have
been
found
to
cause
rapid
damage
and
decay
and
can
become
toxic
when
used
as
combus on
air
in
gas
appliances.
Such
chemicals
can
be
found
in,
but
not
limited
to
bleach,
ammonia,
cat
li er,
aerosol
sprays,
cleaning
solvents,
varnish,
paint
and
air
fresheners.
Do
not
store
these
products
or
similar
products
in
the
vicinity
of
this
water
heater.
Uncon
fi
ned Space
An
uncon
fi
ned
space
is
de
fi
ned
in
Na
Ɵ
onal Fuel Gas Code, ANSI Z223.1/NFPA 54
as
“a
space
whose
volume
is
not
less
than
50
cubic
feet
per
1,000
BTU/hr
(4.8
m
3
per
kW
per
hour)
of
the
aggregate
input
ra ng
of
all
appliances
installed
in
that
space.
Rooms
communica ng
directly
with
the
space
in
which
the
appliances
are
installed,
through
openings
not
furnished
with
doors,
are
considered
a
part
of
the
uncon
fi
ned
space.”
If
the
“uncon
fi
ned
space”
containing
the
appliance(s)
is
in
a
building
with
ght
construc on,
addi onal
outside
air
may
be
required
for
proper
opera on.
Outside
air
openings
should
be
sized
the
same
as
for
a
con
fi
ned
space.
Uncon
fi
ned
Space
Uncon
fi
ned
Space
91,300
BTU
Water
Heater
and
a
100,000
BTU
Furnace
(7.6m)
(7.6m)
(10.6m)
