ASHRAE Standard 127-2020 Addendum b adds CDU rating and test definitions
Addendum b approved 27 February 2026observed
| 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 | The available TCS head is defined between CDU connection boundaries at rated flow; distinguish gross/net cooling and critical/total input power at the stated test conditions. |
| As of | 2026-02-27 |
| Source | Official ASHRAE PDF, approval date on cover. · Section 3 definitions; TCS external pump head available; critical and total input power; reporting in 10.1.6.1 |
| Review | checking…review by 2027-03-05 · standard cadence |
| Recorded changes | last 2026-09-16 |
| Claim id | p5-ashrae-127-cdu-addendum-2026 |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.