Electrolux Over The Range Microwave Oven Maximum duct length, Exhaust connection

Installation Instructions

NOTE: If you need to install ducts, note that the total	Maximum duct length:
duct length of 3¼" x 10" rectangular or 6" diameter	For satisfactory air movement, the total duct length of
round duct should not exceed 140 equivalent feet.
	3¼" x 10" rectangular or 6" diameter round duct
Outside ventilation requires a HOOD EXHAUST	should not exceed 140 equivalent feet.
DUCT. Read the following carefully.	Elbows, transitions, wall and roof
NOTE: It is important that venting be installed using
	caps, etc., present additional resistance to
the most direct route and with as few elbows as
possible. This ensures clear venting of exhaust and	airflow and are equivalent to a section of straight duct
	which is longer than their actual physical size. When
helps prevent blockages. Also, make sure dampers
	calculating the total duct length, add the equivalent
swing freely and nothing is blocking the ducts.
	lengths of all transitions and adaptors plus the length
Exhaust connection:
	of all straight duct sections. The chart below shows
The hood exhaust has been designed to mate with a	you how to calculate total equivalent ductwork length
standard 3¼" x 10" rectangular duct.	using the approximate feet of equivalent length of
If a round duct is required, a rectangular-to-round	some typical ducts.

transition adaptor must be used. Do not use less than a 6" diameter duct.

DUCT PIECES	EQUIVALENT		NUMBER			EQUIVALENT
	LENGTH	x	USED		=	LENGTH
Rectangular-to-Round
Transition Adaptor*	5 Ft.	x	(	)	=	Ft.
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	5 Ft.	x	(	)	=	Ft.
Roof Cap	24 Ft.	x	(	)	=	Ft.
Straight Duct 6" Round or
3¼" x 10" Rectangular	1 Ft.	x	(	)	=	Ft.

Total Ductwork =

Ft.

*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.

Equivalent lengths of duct pieces are based on actual tests and reflect requirements for good venting performance with any vent hood.

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