FHC hydraulic calculation software for use with water-based fire protection systems. FHC hydraulic calculation software is able to calculate almost any type of water-based fire protection system from the conventional tree pipe configuration to the more complicated roof and rack gridded systems. FHC is not just limited sprinkler systems but also has many users worldwide are using our software to aid in the design of high and low-pressure water mist systems using conventional pump sets,  pressurised cylinders and constant pressure pumps.