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Ductless Mini-Split Wall Sleeve

jackofalltrades777 | Posted in General Questions on

On a single zone ductless mini-split. What size should the wall sleeve be for the line set? I’ve read online with some saying 3″ and some even say 4″ to run the line set, condensate line, etc. It’s for a concrete wall so I want to make sure I have the right size sleeve as trying to enlarge the hole later is a very difficult process.

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  1. PAHighEffBldg | | #1

    I would say check the install instructions online. For my Mitsubishi :

    Drill a 3” diameter hole. The outdoor side should be 6/32 to 9/32 below the indoor side. Insert wall hole sleeve.

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