The higher-rated HEPA filters are capable of capturing bacteria plus microscopic allergens
Cows do not have multiple stomachs. They have one stomach that is divided into multiple sections that have bizarre digestive functions. The rumen breaks down the grass that the cow eats. The next digestive stage occurs in the reticulum where the cud is produced. The cud gets burped back into the cow’s mouth where more chewing occurs. Then, the chewed cud is re-swallowed into the omasum that removes excess water from the food mass, next is the abomasum where the food is finally digested. In a way, that delicious steak that the people I was with and I care about is nothing more than grass that has been processed into beef by the steer. Bovine digestion is just one example of how everything in life is a process, however using that same vein of thinking, even the air the people I was with and I breathe in our homes plus workplaces undergoes a process with Heating and A/C systems. The air does not change as dramatically as our grass into beef example, however before it’s heated by the gas furnace or cooled by Heating and A/C cooling tubes, that air is first processed by the air filter, then depending on the MERV rating, air filters remove particulate matter from the air between 0.3 plus 10 microns. The higher-rated HEPA filters are capable of capturing bacteria plus microscopic allergens. Ironically, the purpose of Heating and A/C filters is not to wash the air for your benefit. Their purpose is to keep the particulates from entering the inner workings of the Heating and A/C where it can accumulate plus affect the efficiency of the unit, then protecting your Heating and A/C system is the real reason why it is important to change the Heating and A/C filters correctly. Healthy air to breathe is simply a side benefit that the filters plus Heating and A/C systems make possible, just like beef plus milk made by cows.