Question about Jenn-Air JGR8850 Gas Kitchen Range

2 Answers

Installation of down-draft exhaust duct for Jenn-Aire cook top

I have a Jenn-Aire cook top w/ grill. # JDS 9860 AAP MODULAR W/ DOWNDRAFT Bought about 1 year ago. Just trying to install it.The unit was stored and somehow the instruction were lost. Just need to know what type of duct is needed. Many thanks

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Posted by Delos on

  • 3 more comments 
  • George Wes Dec 05, 2007

    I'm about to purchase the Jenn Air 9900 and want to know if I can do the downdraft installation myself. Where do I find the instructions for the installation of the downdraft...? George ([email protected])

  • Anonymous Jan 06, 2008

    no duct work instructions on the Jenn Air website. it would be helpful since i plan to put the down draft cook top in an island - so the duct work needs to be done before the ceiling in the basement below goes up.

  • Anonymous Aug 26, 2008

    We have a Jenn-Air oven and want to put in an island with a cook top. We have a house on a slab and it has a second story. The island is about 6 feet from the oven and need to know your opinions on how to draft the island which will sit in the middle of the room.

  • anniestine Dec 23, 2008

    We have a problem with the vent on our Jenn-Air gas range.
    We have a crawl space underneath the house and the vent goes down through the floor and out the side. However, we are getting cold air back up through the vent, causing quite a draft. The flap on the outside vent closes and opens properly. What else could be causing this back air to come up form the outside??

  • Anonymous Feb 25, 2009

    My Jenn Aire is a downdraft through the slab to outside. Problem is this unit ducts off the unit back toward the cabinet wall with not enough space to us a 90 round duct. It must use some sort of flat rectangular duct that transitions to a round duct. Where do I get such a duct? Any ideas?



2 Answers


Minimal 6" duct no more than 20 feet long and 90's count as 5 feet. 90's must not be closer than 18" this will meet local codes regarding the venting also an approved exhaust hood. (not a dryer vent)

Posted on May 22, 2008



We're buying a JES9900BAF for an island and found ducting instructions in the installation guide. Go to and find the page for your range model. Then click on the "Specs/Literature" tab (it's about 2/3 down the page). The installation guide is a PDF document.

Posted on Feb 11, 2008


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