Changing the air filters of your central HVAC plan is something that is unquestionably important, but you are supposed to change them once every month or every 2 months. I can be somewhat forgetful; and I was recently… This cost me a severe HVAC plan service as a result, then because I forgot to change the air filter of our central HVAC plan for 4 months it caused it to overtoil itself plus I ended up blowing out both the motor plus the fan of the central HVAC system… And when it first happened I had to call the local heat plus air conditioning system company to send out a certified HVAC specialist to have a look at our central heating plus cooling unit to see what the problem was. When it was discovered that the motor plus the fan had completely gone he asked me when was the previous time I changed the air filter of our central HVAC plan unit. When I told him I was actually embarrassed that I had forgotten all this time. And this was the whole reason our central HVAC plan blew out in the way that it did. I was really fortunate I did not have to invest into a brand new, new plus unquestionably fancy central HVAC plan unit as a result of this foolishness on our part. Well, I paid the price plus learned our lesson real good.