Vacuum pump sizing

HVAC vacuum pump sizing calculator

Enter system cooling tons. Get a 3.5 / 5 / 7 CFM portable vacuum pump class — or NO_MATCH when the ladder cannot cover it.

Vacuum pump sizing

Result

Enter values to begin.

Required CFM ≈ system tons × 1. Classes 3.5 · 5 · 7 CFM. Hose/leaks dominate real time.

Guides

1 CFM/ton rule, CFM classes, and when to stop at NO_MATCH.

Tools

Same tool with room for examples.

Reference

When each portable pump class fits — and when none do.