Installation guide

Installation Instructions

NOTE: If you need to install ducts, note that the total duct

length of 3¼" x 10" rectangular or 6" diameter round duct

should not exceed 140 equivalent feet.

Outside ventilation requires a HOODEXHAUSTDUCT.

Read the following carefully.

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 hood exhaust has been designed to mate with

a standard 3½" x 10" rectangular duct.

If a round 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 satisfactory air movement, the total duct length of

3VJ' x 10" rectangular or 6" diameter round duct should

not exceed 140 equivalent feet.

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.

EQUIVALENT NUMBER EQUIVALENT

DUCT PIECES LENGTH x USED = LENGTH

Rectangular-to-Round 5 Ft. ( ) Ft.

Transition Adaptor*

_ Wall Cap 40 Ft. x ( ) = Ft.

(_ 90° Elbow 10 Ft. x ( ) = Ft.

/45° Elbow 5 Ft. x ( ) = Ft.

90° Elbow 25 Ft. x ( ) = Ft.

_ /45 Elbow 5Ft. x ( ) = Ft.

Roof Cap 2/4Ft. x ( ) = Ft.

Straight Duct 6" Round or 1 Ft. x ( ) = Ft.

3¼" x 10" Rectangular

Total Ductwork = Ft.

* IMPORTANT:If a rectangular-to-round transition Equivalent lengths of duct pieces are based on actual tests and

adaptor is used, the bottom corners of the damper reflect requirements for good venting performance with any vent

will have to be cut to fit, using the tin snips, in order hood.

to allow free movement of the damper.