I know that I shouldn’t have neglected our heating and air conditioning system. It was pretty bad when I finally decided to do something about it. It wasn’t until I learned that you’re supposed to change your air filters at least once every two months. I didn’t even realize that you ever had to change the air filters in the HVAC system. I didn’t really do it on purpose, it’s just that I never thought that I was the one who’s supposed to be changing the air filters. Once I realized that I had to change the air filters, I went online and I did research on just what I had to do and not what kind of air filters I needed to purchase. That is when, I found out that air filters are all different. Air filters have ratings just like air conditioning units and I found out that the air filter I was using have the wrong MERV rated air filter. MERV is the minimum efficiency reporting value. The MERV is there to tell you how well your air filter is able to handle the microorganisms and germs that are in your air. I thought maybe I should buy a HEPA filter. The HEPA is used in hospitals and in doctor’s offices. The HEPA filter is able to clear out all of the germs and bacteria that even comes when someone sneezes. Unfortunately, the HEPA filter is also quite expensive. The man at the counter told me that if I really wanted to purchase HEPA filters, it may behoove me to go online. Many times, you can buy just about anything, including HEPA filters, at a much cheaper price than what you would pay in a store.