Refrigerant Line Set Sizing Calculator

Does line-set length affect the size I should run?

Yes. This calculator sizes primarily from capacity and application, using equivalent length for advisory notes rather than a precise correction. Beyond about 80 ft it warns to confirm liquid-line pressure drop and consider upsizing to prevent flashing at the metering device; beyond 150 ft a liquid-line solenoid, receiver, oil management, and a full ASHRAE pressure-drop calculation are typically required.

Related questions

• What size line set do I need for a 3-ton AC?
• Why does a freezer need a bigger suction line than an AC of the same tonnage?