If you obtain a copy of the standard, here is what you will find inside:
The standard dictates different maximum MLC thresholds based on the ASHRAE climate zone where the facility is located. 2. Electrical Loss Component (ELC)
Purchase the official ASHRAE 90.4-2022 PDF from the ASHRAE website today. Then, use the compliance workflow outlined above to benchmark your design or existing facility. In the high-stakes world of data center operations, efficiency equals reliability—and ASHRAE 90.4 is the key to unlocking both. ashrae 90.4 pdf
Below, we provide a comprehensive guide to understanding and using ASHRAE 90.4, including key requirements, how to obtain the official PDF, and a summary of recent updates.
Just like the MLC, the combined ELC must remain below the standard’s maximum thresholds for your specific infrastructure type. Flexible Compliance Paths If you obtain a copy of the standard,
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Historically, data centers fell under (the code for standard commercial buildings). However, standard commercial buildings are designed for human comfort, whereas data centers are designed to house mission-critical IT equipment. Data centers operate 24/7, experience massive internal heat loads, and prioritize reliability above almost all else. Standard 90.4 was created to provide a code-enforceable document tailored specifically to these intense operational realities. ASHRAE 90.1 vs. ASHRAE 90.4: Key Differences Then, use the compliance workflow outlined above to
Compliance with ASHRAE 90.4 relies on a flexible, performance-based approach. Rather than forcing designers to use specific pieces of equipment, it sets performance thresholds using two primary metrics: and Design Electrical Loss Component (Design ELC) . 1. Mechanical Systems & Design MLC
The latest version is , which expands the scope of previous editions (2016, 2019, 2022) to include broader sustainability metrics like greenhouse gas emissions and water usage. Where to Find the ASHRAE 90.4 PDF
