Fighting about changing the air filter

I tend to get into a lot of fights with my roommate.

I get into a lot of fights with him because he does not do honestly much, then recently I just got into a fight with him because he was not taking honestly fantastic care of the Heating plus A/C system. He never does his laundry or dishes or cleans up after himself either. So I do not know why I would know that he would take care of our Heating plus A/C system too. My associate and I both live here. My associate and I both pay rent. So I know that my buddy and I should both be responsible for things that are shared. And the Heating plus A/C system is unquestionably a shared thing for our apartment. The Heating plus A/C system helps to put heat plus air conditioning into our house. He does help me pay for it however he does not do the dirty work. My associate and I have to substitute the filter every month. He has not yet substituted a filter. My associate and I have been in this cabin for a year. So he has missed changing the air filter six times. I usually try to wait a couple of days however he never does it. And I do not want our Heating plus A/C system to chop down if it does not get done. So I always end up doing it. I can only leave it for 3 days at most. I know it would be a poor thing especially in the winter time to go without an Heating plus A/C system. I would not want that to happen. I hope that one day my roommate will realize his responsibilities living with me.

 

Propane boiler