Two filters can run at the exact same filtration rate and still perform very differently — one might reliably run 24 hours between backwashes while its twin, treating identical water, needs backwashing every 14. Filtration rate alone can't tell you that. What can is a single performance number that folds rate and run duration together: unit filter run volume. This guide covers UFRV as a system-level performance metric, along with the media-volume and backwash-water-accounting calculations a Class B operator uses to actually optimize how a filter bank is run — not just monitor it.
UFRV: The Unit Filter Run Volume Performance Metric
Where filtration rate answers "how fast is this filter running right now," unit filter run volume (UFRV) answers a different and arguably more useful question: **"how much total water did this filter produce, per square foot of media, over the course of on