Ashrae 90.4 Pdf

ASHRAE Standard 90.4, Energy Standard for Data Centers , is a copyrighted document that can be purchased, though free read-only versions of the 2022, 2019, and 2016 editions are available through the ASHRAE website

This limits losses from the utility feed all the way to the server rack. This includes UPS losses, transformers, and PDU inefficiencies. If your UPS is 5+ years old, you might already be failing this requirement. ashrae 90.4 pdf

Disclaimer: This article is for informational purposes only. Always consult a licensed professional engineer and the official ASHRAE standard for actual compliance requirements. ASHRAE Standard 90