Mini-split accessories
The line set is the pair of insulated copper tubes that carries refrigerant between the indoor and outdoor units. Two things decide which one you buy, and only one is your choice: the diameters are dictated by your unit's BTU size (match the manual exactly), and the length by your measured run plus a little slack. DIY systems ship a pre-charged, quick-connect set; pro installs use a bare set the tech flares and evacuates. Full detail is in the line-set guide.
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The line set that makes a DIY mini split installable - already charged with refrigerant and sealed with quick-connect fittings, so you never open the refrigerant circuit. Buy the length that matches your run.
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The uncharged copper set a professional cuts, flares, connects, and vacuums down. For pro installs only - it requires refrigerant handling and a vacuum pump.
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Replacement insulation, flare nuts, and tape to finish a bare-line install cleanly - the small parts that keep the run efficient and leak-free.
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