Methodology guide
Limits, CU math, and when to stop shopping this ladder.
Calculator
Pressure washer CU calculator
Enter a job code (1–6). Get a 3520 / 8840 / 17600 Cleaning Units class or NO_MATCH.
Result
Cleaning Units = PSI × GPM. Worked check: job 1 (vehicles) → electric 2000×1.76 (3520 CU).
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