[kalahas]

Hello

I am trying to install a new broan rangehood under the cabinet as i had to replace the old one. i am using the 'L" shaped ducting which vents the air outside. Now with the new install, I am having a gap of around 2.5". Please advice how I can fix this duct gap. I have enclosed an image of the same.

Thanks in advance

 

[surferdude2]

Something like this could be your answer.
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Duct Sleeve

 

[Nealtw]

I have always go stuck buying a length, sometimes as short as 3ft. They come open so you can cut them with tin snips and then they close up with a snap, no big deal.