need advise on ductless split ac line set

Old 06-12-09, 09:20 AM
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need advise on ductless split ac line set

I am looking to install an 18000 btu split ac. one brand, 'Shinco' has the line set at 1/2" for the gas and 1/4" for the liquid line. Other brands that I have seen use bigger sizes - 5/8" for the gas and 3/8" for the liquid.

I am trying to understand the significance of the line set sizing as it relates to performance and anything else that is important. can someone shed some light?

Old 06-12-09, 10:31 AM
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The line set size is determined by the manufacturer based on equipment type, refrigerant type, and size of equipment.

1/2 and 1/4 are not uncommen for a mini-split.
Old 06-12-09, 02:37 PM
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Welcome to our forums!


There is a sticky at the top of this forum topic that explains we do not offer or support diy a/c installation as you must be qualified and certified to work with this equipment.

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