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Greenheck: Fan Energy Index
The Fan Energy Index (FEI) is a comprehensive metric used to identify fan systems that operate more efficiently, quietly and reliably. It helps engineers select optimal fans while flagging poor-performing options during review. This educational resource page explains the metric, offers selection guidance and includes codes, compliance details, FAQs and links. Using it leads to lower energy use, reduced operating costs and carbon emissions, quieter performance and more flexibility in fan selection.
More From 10/22/2025 on FacilitiesNet