I have to say that no matter what anyone says about air filters for central heating plus cooling systems, that HEPA air filters are by far the absolutely best around.
HEPA air filters last the longest out of all other air filters I have tried, plus also, HEPA air filters help keep the indoor air quality great plus top notch all around.
I first found out about HEPA air filters when the local heating plus cooling specialist from my local heat plus a/c supplier told myself and others about them plus how they may be expensive, however they will make my central heating plus cooling unit work a lot smooth plus better. And how I can also save some time plus energy of having to go to the store to buy new air filters if I used HEPA brand air filters. Simply because they last a little longer. Also, HEPA has these things called washable air filters which I have not tried yet. With these washable air filters you are supposed to be able to wash plus recover the same air filter 3 or 4 times before discarding it. This could save money if they absolutely work as they are supposed to. I am going to buy a few of these washable HEPA air filters next time I am at the store to try them out. I bet they are going to be great because after all, HEPA air filters are the absolutely best no matter what. They always will be unless some other supplier comes up with something to outdo them. Which I realistically do not see happening any time in the near future!