JennAir CVE4180S-C, CVE4180S, CVE4180B-C, CVE4180B, CVE3401W Installation Instructions
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Downdraft
Ducting
Guide
T
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IGN OF A
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Downdraft
Ducting
Guide
Important Information
Dealer
Installer
Model and Serial Numbers
Equivalent Length
Fittings Required
Questions
When considering the location for a Jenn-Air product, environmental influences that can affect ventilation performance must be considered.
Make-Up Air - The air that is exhausted by the unit
must be replaced. If a room or house is too “tight”,
the unit may not vent properly. If a house or room is
too tight, it will be necessary to introduce more air
into the environment. Some air conditioning and
heating units allow for make-up air.
Air Movement - Any other air movement devices
such as, ceiling fans, air conditioner registers, etc.
can create air currents which interfere with downdraft ventilation.
Adjacent Cabinets - Cabinets that are closer than
the minimum distance allowed can create dead air
pockets that impair performance. For maximum
performance, the recommended distance to adjacent
cabinets or walls is 6”. However, the minimum
clearance can be from 2 inches for cooktops to 1
inch for ranges. Please refer to the installation
instructions for the particular product.
Jenn-Air downdraft ranges and cooktops will adapt
to various installation locations. The blower assembly is capable of duct runs up to 60 equivalent feet.
When planning a particular installation, please refer
to this guide to ensure that all of the ducting needs
will be met. Always refer to the product and ducting installation instructions included with the JennAir product.
Jenn-Air downdraft ventilation systems are
designed to move air at a high rate of speed. High
speed air flow will ensure the exhausting of smoke
and fumes and will hold grease and moisture in suspension until exiting the home.
The downdraft cooking system operates on the
principle of localized or “proximity” ventilation.
This system creates a high velocity exhaust air pattern near the cooking surface. The air movement is
created by a blower motor and squirrel cage fan
blade encapsulated by a blower scroll. This scroll is
aligned with a plenum chamber. On cooktops, the
scroll is attached directly to the plenum chamber.
On ranges it mounts remotely under the range.
Since this system differs from the familiar forced-air
heating and air conditioning system you may have
in your home that uses low velocity air flow, the
Jenn-Air system will require different duct work
design techniques.
This guide will take you step-by-step through the
planning process and will assist you in determining
the types of materials needed to properly install a
Jenn-Air product.
The goal of the system is to maintain the proper
amount of airflow to efficiently pull smoke and
other cooking fumes to the outside without pulling
excessive air across the cooking surface. Too little air
movement will result in a smoke filled kitchen
while too much air movement will result in prolonged cooking times due to cooled off food.
The equipment design is flexible enough that the
ducting can be done simply with up to three turns
(elbows) and not rely on fancy sheet-metal work.
Proximity Ventilation Cooktop Example
Introduction
1
STEP
Environment
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