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.
Half Facepiece & Full Facepiece Gas Mask/Chemical Cartridge Respirators. These chemical and gas masks are also known as air-purifying respirators because they filter or clean chemical gases and particles out of the air as you breathe.