Construction
Refrigerant Line Set Calculator
Get the suction/liquid line sizes right. Wrong sizing = capacity loss, oil return failure, compressor damage.
Suction line
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- Liquid line
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- Length penalty
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- Trap required?
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FAQ
Why does length cause capacity loss? +
Pressure drop in the suction line means the compressor sees lower density refrigerant — less mass moved per cycle.
Long line sets? +
Manufacturer max is usually 50-75 ft for residential mini-splits. Past that, look at multi-zone units placed closer.