At what PSI are most fog nozzles designed to operate?

Most fog nozzles are designed to operate at 100 PSI. This pressure level allows for optimal performance by balancing the flow rate and spray pattern needed for effective fire suppression. Operating at 100 PSI ensures that the water is atomized into fine droplets, which enhances cooling and allows for better penetration into the fire area, improving efficiency in extinguishing flames. Additionally, this pressure helps maintain a manageable nozzle handling experience for firefighters, contributing to operational safety and effectiveness during fire suppression activities.