Which foam type is considered three-dimensional and used for fires in confined spaces?

High expansion foam is designed to create a large volume of foam that expands significantly and can fill confined spaces effectively. This type of foam is particularly useful for suppressing fires in areas like basements, cargo holds, or storage facilities where the fire might be difficult to access and control. Its ability to displace oxygen within the space while simultaneously cooling the fire makes it especially effective in three-dimensional fire scenarios, as it can fill areas and envelop burning materials from multiple angles.

High expansion foam’s unique properties allow it to form a blanket over the fire, smothering it and preventing the release of harmful smoke and heat. This can protect both responders and property in places where traditional firefighting methods may be less effective.

Other foam types, while useful in various firefighting situations, do not offer the same capacity for expansion and the volume needed to adequately tackle fires in confined spaces. Low expansion foam is typically used for surface fires, alcohol-resistant foam is formulated specifically for certain types of flammable liquids, and regular foam would not provide the same three-dimensional filling capability as high expansion foam.