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I have open space above cabinets and wife does not want a chimney on our range hood.

SO I am looking for an elbow that will take the 8" round vertical exhaust and go 90 degrees into a 10x3.25" (we have ~4" of molding above cabinets) enter image description here

I found this online, but it's not quite the right size. Anyone know if there is a proper term for this I can search, or if I could get one to meet my specs?

enter image description here

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I would take a piece of 10x3.25 duct, cap off one end and cut an 8" hole in one side and add a flange to connect the 8" duct to. These should be common parts that are easier to source than some exactly sized elbow that still might need modification.

  • thank you! I guess without adding any additional height any elbow I find would essentially have the same airflow restriction/back-pressure from this sudden change . – Eddie Aug 22 at 15:47
  • You may be able to put some curved baffle inside this home-made option to help direct the airflow. You can always put some more time into it - I just listed the basic idea. – JPhi1618 Aug 22 at 15:49
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    Note that 10x3.25 has a cross section of about 32. 8" round is more like 50 - so you will have a lot more restriction. – Martin Bonner supports Monica Aug 23 at 14:31
  • Thanks @MartinBonner! The hood itself uses a 10x3.25 if venting horizontally, the 8" vertical is I think larger to allow the optional 2nd blower that we're not purchasing. So hopefully the flow will be sufficient – Eddie Aug 23 at 14:59
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Go to any HVAC shop or duct fabricator, explain what you want and they may be able to make it to your specs.

  • Ah great point. Some family friends have a local HVAC business here, but I never thought to ask them. – Eddie Aug 23 at 14:57
  • I was just at Home Depot yesterday and saw a 6" straight X 3 1/4" adapter near the appliance parts, if that will help. – d.george Aug 24 at 10:16

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