Installation Instructions

EQUIVALENT NUMBER EQUIVALENT
DUCT PIECES LENGTH x USED = LENGTH
Rectangular-to-Round 5 Ft. (1.5 m) x ( ) = Ft. or m
Transition Adaptor*
Wall Cap 40 Ft. (12.2 m) x ( ) = Ft. or m
90° Elbow 10 Ft. (3 m) x ( ) = Ft. or m
45° Elbow 5 Ft. (1.5 m) x ( ) = Ft. or m
90° Elbow 25 Ft. (7.6 m) x ( ) = Ft. or m
45° Elbow 5 Ft. (1.5 m) x ( ) = Ft. or m
Roof Cap 24 Ft. (7.3 m) x ( ) = Ft. or m
Straight Duct 6“ (15.2 cm) 1 Ft. (0.3 m) x ( ) = Ft. or m
Round or 3
1
⁄4“ x 10“
(8.2 x 25.4 cm Rectangular)
Total Ductwork = Ft. or m
Equivalent lengths of duct pieces are based on actual tests
and reflect requiremen ts for good venting performance with
any vent hood.
* IMPORTANT: If a rectangular-to-round transition
adaptor is used, the bottom corn ers of th e damper
will h ave to be cut to fit, using the tin snips, in order
to allow free movement of the damper .
NOTE: If you n eed to in stall ducts, note th at the total
duct length of 3
1
⁄4” x 10” ( 8.2 x 25.4 cm) rectan gular or
” ( 15.2 cm) diameter roun d duct
Outside ventilation requires an EXTERNAL EXHAUST
NOTE: It is important that venting be installed using
the most direct route and with as few elbows as possible.
This en sures clear ven ting of exhaust and helps preven t
blockages. Also, make sure dampers swing freely and
nothing is blocking the ducts.
Exhaust connection:
The exh aust adaptor has been designed to mate with
a standard 3
1
⁄4” x 10” ( 8.2 x 25.4 cm) rectan gular duct.
If a roun d duct is required, a rectangular-to-round
Maximum duct length:
For satisfactory air movemen t, the total duct length of
3
1
⁄4” x 10” ( 8.2 x 25.4 cm) rectan gular or
6 ” ( 15.2 cm)
diameter roun d duct should not
exceed 120 equivalent
feet (36.5 m).
Elbows, transitions, w all and roof caps,
etc.,
present addition al resistance to air flow an d are
equivalent to a section of straigh t duct which is longer
than their actual physical size. When calculating the total
duct length, add the equivalen t length s of all transitions
and adaptors plus the length of all straight duct sections.
The chart below shows you h ow to calculate total
equivalent ductwork len gth using the approximate feet
of equivalent len gth of some typical ducts.
Installation Instructions
INSTALLATION INSTRUCTIONS FOR EXTERNAL EXHAUST DUCTING
DUCT.Read th e following carefully.
(12.5”
should not exceed 120 equivalent feet (36.5 m).
diameter/ 6
(12.5”
diameter/
7 cm)
7 cm)
transition adaptor must be used.
diameter duct is acceptable to use.
"
A 5"""''''' " (12.7cm)/ 6" (15.2cm)
"
EN-10