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Simple Hydraulic Calculator (SHC), published by Igneus Incorporated, is a computer application for performing fire sprinkler hydraulic calculations, currently available in version 2.3.9 as the sole listed version. Designed from the ground up for automatic fire sprinkler system designers and engineers, it falls within the fire protection engineering software category and serves professionals who need to model and verify sprinkler system hydraulics. SHC uses the Hazen-Williams and/or Darcy-Weisbach friction loss equations to hydraulically calculate fire sprinkler systems in compliance with NFPA requirements. Any piping configuration may be calculated, including trees, loops, grids, and completely custom layouts, while fire pumps, backflow preventers, and multiple water sources are all supported. The application includes a full set of tools for evaluating calculations: the calculation results window serves as the primary evaluation tool, displaying all relevant pipe, node, and system information in a clear tabular format, with pipes and nodes sortable by chosen values. This window may remain visible while the user continues to edit the input data, allowing results to be reviewed alongside ongoing model changes. At the top of the data input window, a "live look" bar displays important calculation values for individual pipes and nodes as the text or mouse cursor passes over items in the editor, making it well suited to quick spot-checks of individual components. Additionally, the system demand graph and pressure loss pie graph may be displayed on screen or saved as an image for use in other documents, supporting reporting and documentation workflows. Typical use cases include designing new automatic fire sprinkler systems, verifying hydraulic compliance with NFPA standards, evaluating system demand against available water supplies, and preparing graphical output for project documentation.
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