Vacuum pump CFM calculator
System tons → portable pump class or NO_MATCH.
Resources
VacPump resources
Calculator, methodology guide, CFM class comparison, and worked examples for HVAC vacuum pump sizing.
Sizing guide
Why the 1 CFM/ton rule matters for evacuation.
Class comparison
3.5 / 5 / 7 CFM portable pump ladder.
Worked examples
Mini-split, residential, large split, NO_MATCH.
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