Velocity-based ACR copper tube sizing for suction, discharge, and liquid lines. Supports R-410A, R-22, R-32, and R-134a.
| Line | Min Velocity (FPM) | Max Velocity (FPM) | Purpose |
|---|---|---|---|
| Suction (horizontal) | 500 | 4,000 | Oil return to compressor |
| Suction (vertical riser) | 1,000 | 4,000 | Must entrain oil upward |
| Discharge (hot gas) | 1,000 | 3,500 | Oil return; sound control |
| Liquid line | 75 | 300 | Prevent flashing; low pressure drop |
This calculator handles one step. AIM Works runs the complete MEP design workflow — thermal load calculations, duct & pipe networks, equipment selection, code compliance, and an AI design assistant — in one tool.