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Introduction: Why ASHRAE 90.4 Matters In the digital age, data centers are the backbone of global commerce, communication, and cloud computing. However, they are also notorious for their immense energy consumption. According to the International Energy Agency (IEA), data centers account for roughly 1% of global electricity demand. To combat this, engineers and facility managers rely on rigorous standards.

Officially titled "Energy Standard for Data Centers," ASHRAE Standard 90.4 is a game-changer. While its sibling, ASHRAE 90.1, covers most commercial buildings, Standard 90.4 is tailored specifically for the unique mechanical (HVAC) and electrical (power distribution) loads of data centers.