Are primary aspirated (aspirated) and secondary aspirated (unaspirated) foam used for different applications?

Though both aspirated and unaspirated foam are low expansion foams, and used for the same application, unaspirated foam can be projected further due to higher density as compared to aspirated foams. Hence unaspirated foam is increasingly being preferred for fighting large flammable liquid fires where large capacity foam monitors are employed in the attack.

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