58
FP1LM
Manoir
‐
Installation
and
Operation
Manual
3.
Maintain
at
least
a
2"
(50
mm)
clearance
between
the
ducts
and
the
firestop;
the
required
hole
size
for
the
hot
air
grilles
(outlet)
is
8¼"
×
8¼"
(210
mm
×
210
mm).
4.
The
maximum
number
of
elbows
in
a
run
of
duct
is
two.
5.
Maintain
at
least
10"
(254
mm)
clearance
from
the
outlet
grille
framing
to
a
combustible
ceiling,
side
wall
or
mantel.
6.
When
passing
through
a
combustible
wall
or
floor,
a
firestop
must
be
installed
at
the
wall
or
floor
penetration.
The
hole
size
must
be
in
accordance
with
the
duct
manufacturer’s
instructions.
