The illustration shows a generic example of a box plot with the maximum, third quartile, median, first quartile, and minimum values labeled. The relative vertical spacing between the labels reflects the values of the variable in proportion.
Respirator Types Two basic types of respirators are: â¢ air-purifying; andâ¢ supplied-air respirators. Air-purifying respirators remove airborne contaminants such as particles, toxic vapors, and/or gases.
Basic SARs and combination atmosphere-supplying respirators are similar in that the wearer is tethered by an air supply hose to the supply of breathing air. Where these two styles differ is in the additional level of protection offered in the combination style respirators.