99% of airborne particles are invisible to the naked eye.
MERV: Size of the holes. Density of the holes in the filter that allows air to flow through.
v Higher the MERV number the smaller the hole to STOP more particles.
v Most homes naturally generate about 40 pounds of dust per year for every 1,500 square feet of space.
v As you age your threshold for Allergens grow less. Up to 72 trillion allergens find their way into your home every day.
v 0.3 microns is more than 600 times smaller than the tip of a pencil point. Particles this small have the best chance of being inhaled. Irritating particles like dust, soot, mold spores, and bacteria are often .3 microns. This size particle can get deep into your lungs because they aren’t filtered well by your nose and throat.
v Particles smaller than 2.5 microns pass through lungs and into blood stream potentially causing illness.