A fan with particle filters that is easy to operate on batteries; the SR 700 is a battery-powered fan that, along with the SR 510 P3 R or SR 710 P3 R particle filter and an approved hood, is part of the Sundström powered air-purifying respirator device; the SR 700 can be used as an alternative to filtering respirators in all recommended situations; this is especially true for work in harsh conditions, heat, or long-term work; the fan is equipped with a filter and the filtered air is delivered through a hose to the user interface; the generated pressure prevents surrounding pollutants from penetrating the mask.