dad always leaves the HVAC filters

I’m happy to report that I am going to visit my parents this weekend.  I’m happy because I have not seen them in more than a month, and this is not because I don’t want to, but just because I have a demanding job schedule plus 2 kids to deal with as well.  However, it is time for the children to go visit their Grandparents.  It actually has been far too long, but my parents live more than seven hours away, so it is not a quick drive by any means. It is also actually hard to travel with 2 small children, but at least my spouse will be able to make this trip with me.  Last time he was unable to because he could not get away from work.  I do care about seeing my parents, but there is one thing that I am not super happy about. They live in an old, wooden house. It is  much older than most homes and it is quite outdated, but they have it paid off so they are certainly not interested in moving anytime soon. This much-used,old house also has an older and outdated heating  and A/C system. I suppose they most likely never change their air conditioning filters either, so the air circulation in the house is almost nonexistent. It actually feels hard to breathe because the air feels so musty and dirty with dust swirling around. I don’t understand why they are so determined to continue living like this, even though I have tried several times to get them to call a Heating plus A/C professional to come and update their heating and cooling system. I understand that they do not want to spend the money, even though I think it is well worth it to have a better air filtration system.

furnace filter