The , established by the American Society of Heating, Refrigerating and Air-Conditioning Engineers , serves as the primary energy efficiency standard for data center design and operation. As of early 2026, the standard is transitioning from the widely adopted 2022 edition to the newly released 2025 edition , which expands its focus from pure energy efficiency to broader sustainability goals. Core Purpose and Scope
ASHRAE TC 9.9: Data Center Thermal Guide | 2026 - Envigilance ashrae 904 pdf upd
Measures the efficiency of the cooling systems. The , established by the American Society of