Frigidaire FFMV162LM Installation Instructions | Page 10

Frigidaire Air Conditioners Installation Instructions - FFMV162LM.
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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 31⁄4“ 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 requirements for good venting performance with 
any vent hood.

* IMPORTANT: 

If a rectangular-to-round transition

adaptor is used, the bottom corners of the damper
will have to be cut to fit, using the tin snips, in order
to allow free movement of the damper.

NOTE:

If you need to install ducts, note that the total

duct length of 31⁄4” x 10” (8.2 x 25.4 cm) rectangular or

” (15.2 cm) diameter round 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 ensures clear venting of exhaust and helps prevent
blockages. Also, make sure dampers swing freely and
nothing is blocking the ducts.

Exhaust connection: 
The exhaust adaptor has been designed to mate with 
a standard 31⁄4” x 10” (8.2 x 25.4 cm) rectangular duct.
If a round duct is required, a rectangular-to-round 

Maximum duct length: 
For satisfactory air movement, the total duct length of 
31⁄4” x 10” (8.2 x 25.4 cm) rectangular or

 6 ”(15.2 cm) diameter round duct should not 

 exceed 120 equivalent feet (36.5 m). 

Elbows, transitions, wall and roof caps,
etc., 
present additional resistance to airflow and are
equivalent to a section of straight duct which is longer
than their actual physical size. When calculating the total
duct length, add the equivalent lengths of all transitions
and adaptors plus the length of all straight duct sections.
The chart below shows you how to calculate total
equivalent ductwork length using the approximate feet
of equivalent length of some typical ducts.

Installation Instructions

INSTALLATION INSTRUCTIONS FOR EXTERNAL EXHAUST DUCTING

DUCT.Read the 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

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