full-flow TCS filtration in 2026 CDUs is typically ~25-50 µm; separate side-stream polishing can be sub-micron (0.2 µm on Deschutes-design units)
~25–50 µmobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | Full-flow ratings range from 25 µm (Motivair WCDU) and 25–44 µm (OCP Project Deschutes 1.0.0) to 50 µm (older Vertiv guidance). Sub-micron polishing is a separate side-stream stage, 0.2 µm in the Deschutes spec. Follow the rack OEM's cleanliness requirement. |
| As of | 2026-09 |
| Source | Open Compute Project, Project Deschutes specification 1.0.0 (2026-02-26); Schneider Electric / Motivair WCDU release (2026-09-23); Vertiv CDU guidance · Deschutes §3.2 items 6–7 (25–44 µm full-flow; 0.2 µm side stream); Vertiv “How do CDU Units Work?”: CDU filters are typically 50 microns |
| Review | checking…review by 2027-04-14 · standard cadence |
| Recorded changes | last 2026-10-17 · 3 revisions tracked |
| Claim id | common-tcs-side-stream-filtration-sub-micron-e |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.