If a sprinkler system has to operate at low pressures due to many heads being open, what is the average coverage area for each head in square feet?

When a sprinkler system operates at low pressures due to the simultaneous activation of multiple heads, it typically provides a reduced flow rate, which in turn affects the effectiveness and reach of the water being discharged. In such situations, each sprinkler head is designed to cover an average area of about 100 square feet.

This average coverage area ensures that each head can effectively saturate the designated area with enough water to combat a fire, even when several heads are activated at once. It is essential for fire safety operations that the sprinkler system maintains adequate coverage to control or suppress fire incidents effectively, especially under conditions of reduced pressure.

The 100 square feet per head figure is a standard derived from engineering principles and real-world testing, which takes into account the water droplet dispersion patterns and the need for overlapping coverage between heads to ensure comprehensive protection.

Knowing this average coverage can help fire officers and safety personnel design and assess sprinkler systems appropriately, ensuring they can function optimally even under challenging conditions.