What is the defining feature of a Demand supplied air respirator?

A Demand supplied air respirator is characterized by its mechanism that delivers air only when the user inhales. This design allows for a more efficient and controlled supply of respiration support. The system activates to provide fresh air as needed, effectively conserving resources by not wasting air when the user is not inhaling. This on-demand functionality ensures that the user receives appropriate air flow during their inhalation while minimizing the consumption of supplied air during exhalation or rest periods.

This enables better management of air supply, preventing unnecessary depletion of air resources, which is particularly valuable in environments where air is limited and must be conserved. Such functionality can be crucial in various industrial and hazardous settings, ensuring the user maintains an adequate breathing supply only when required.