What three factors must be calculated in relation to fire protection systems?

The three factors that must be calculated in relation to fire protection systems are elevation, nozzle pressure, and friction loss.

Elevation is important because it influences the amount of pressure required to deliver water to the required height in a fire suppression system. Water must be pressurized sufficiently to reach the necessary elevation, which often involves calculations to ensure that the system can effectively deliver water to upper levels in buildings.

Nozzle pressure is the pressure at which the water exits the nozzle and is crucial for ensuring that the water is discharged adequately and effectively to extinguish fires. To achieve optimal performance of the firefighting equipment, the nozzle must operate within a specific pressure range so that the water can reach the fire and create the desired pattern of flow.

Friction loss refers to the loss of pressure that happens as water moves through hoses, fittings, and other components of the fire protection system. This loss must be calculated to ensure that the system maintains sufficient pressure at the nozzle to achieve effective firefighting capabilities.

Together, these three factors are critical for the design and operation of fire protection systems, ensuring that firefighters can deliver an effective firefighting flow adequately and efficiently to extinguish fires.