Would you jump into a building engulfed in flames? Most of us wouldn’t, so luckily we have a few brave souls that do. To help prevent the harmful effects of smoke on firefighter’s lungs, John and Charles Dean patented the first air filter in 1823. From 1823-1871, the air filter progressed and was used by coal miners, divers and as a gas mask for the war efforts. In order to keep air clean from radioactive materials during World War II, scientists developed the HEPA (High Efficiency Particulate Air) filter. The HEPA filter remained classified for quite some time until its benefits were realized everywhere! The HEPA filter filters out 99.7 percent of all particles that are .3 microns in size. Now HEPA filters help purify air in hospitals, schools, and in homes to keep indoor air fresh and clean! Keep your home’s floors and air cleaner and healthier with BISSELL’s new Healthy Home Vacuum.