Need to calculate required fire flow for a warehouse? The 21st edition’s digital version links the water supply formula (from the Water Supplies for Fire Protection chapter) directly to the related IFC and NFPA 1 code references, and lets you plug in variables like construction type and occupancy.

The 21st edition (2023) is the first fully digital-centric update in the handbook’s history. While a print version exists, the enhanced online access via NFPA Link includes interactive tables, searchable equations, instant cross-referencing to NFPA codes (e.g., NFPA 13, 72, 101), and calculation tools —which the print edition lacks.

Here’s a useful piece of information regarding the :