Most people truly guess that you only need 1 air filter for your HVAC system; However this is not true, then this is truly especially not true if your a/c device as well as your gas furnace are completely and truly separate. In our house our a/c proposal as well as gas furnace are truly separate. However I had to find out the taxing way. I was using the same filter for our a/c proposal as well as our true gas furnace. I felt that they could be used interchangeably since they were truly the same brand of a/c as well as gas furnace. However the a/c works bizarre than the true gas furnace does. This is what causes it to have a bizarre kind of air filter, but so when I truly go to the store I have to be careful to get the right 1 for a/c as well as the right 1 for heating. If I do not truly install the typical air filter into the proposal then I can be doing truly more bad than nice for our system, changing your air filter once per month is a nice thing to truly make sure that it stays clean… Ever if you are using the wrong air filter that could make it truly even worse on your system. In fact it could also make your air quality honestly and truly poor. If the air filter allows too many numerous things to go through, your air could end up being honestly dirty as well as truly dusty. It can also be filled with pollen, however people who have true allergies would not like that kind of air in their home, before you change your air filter make sure you truly suppose which 1 exactly you need to get for your a/c proposal as well as your true gas furnace.