GE EMO3000 Installation Instructions Manual page 5

Installation Instructions
NOTE: lfyou ueed to inslall ducts, uole that the total
duct length of 3¼" x 10" rectaugular or 6" diameter
round duct should not exceed 140 equivalent feet.
Oulside vemilation requires a HOOD EXHAUST DUC'E
Read the followiug carefully.
NOTE: It is imporlant lhat venting be inslalled using
the most direct route and with as few elbows as possible.
This ensures clear veuling of exhaust aud helps prevent
blockages. Also, make sure dampers swing freely and
nothing is blocking the ducts.
Exhaust connection:
The hood exhaust has beeu designed m Illa/e with
a slandard 3_(' x 10" rectangular duct.
If a rouud duct is required, a rectangular-to-round
transition adaptor must be used. Do not use less than
a 6" diameter duct.
Maximum duct length:
For satisfaclory air Inovement, the tolal duct lenglh of
3W' x 10" rectangmlar or 6" diamewr round duct should
not exceed 140 equivalent feet.
Elbows, transitions, wall and roof caps,
etc.,
present additional resistance to airflow and are
equivalent m a section of straight duct which is longer
than their actual physical size. When calculating Ihe mlal
duct lenglh, add the equivalent lengths of all transitions
and adaptors plus the length of all straight duct sections.
The chart below shows you how m calculate total
equivalent ductwork lenglh using the approximale feet
of equivalent length of some typical ducts.
EQUIVALENT NUMBER EQUIVALENT
DUCT PIECES LENGTH x USED = LENGTH
Rectangular-to-Round 5 Ft. x ( ) Ft.
Transition Adaptor*
'_ Wail Cap 40 Ft. x ( ) Ft.
45° Elbow 5 Ft. x ( ) Ft.
90° Elbow 25 Ft. x ( ) Ft.
45° Elbow 5 Ft. x ( ) Ft.
Roof Cap 24 Ft. x ( ) Ft.
Straight Duct 6" Round or 1 Ft. x ( ) Ft.
3W'x 10" Rectangular
Total Ductwork = Ft.
* IMPORTANT: Iia rectangqaaPto-round trmlsition t';(luivalc]lt lengths of duct pic{ cs arc based Oll actual tests
ada )tot is used, t|]_" bottoln t'ornels ot the dam )er and refle_ t reqttir_'lll_'nts for good venting pcrformallCC wit]t
will have to be cut to tit, ilsing the tin sni )s, in order any vent hood.
to al]ow ti'cc mov( mcnt of the dmnix'r.
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