When are they going to let this go

Last week, I was talking to my husband about the air filters.  I told him about all of the information I had found on the importance of decreasing the air filters.  He told myself and others that he took care of all of that stuff, as well as I didn’t need to worry about it.  I never saw him buy any air filters for the gas furnace. I didn’t even know what the air filters for the gas furnace looked like.  I knew that he pulled the air filter out of the cooling system quite often, even though I didn’t know where they were, or what they looked like.  He just told myself and others that cooling system air filter was taken care of. I was actually pondering what would happen if he were gone 1 year, as well as I had to do the air filter decreasing.  He showed myself and others where the air filters were for the A/C as well as he walked myself and others through decreasing it. I asked about the gas furnace air filter as well as asked myself and others if I trusted him.  Every one of us have been together for over twenty years, so there must be some trust there. He told myself and others there were no air filters in our gas furnace. I thought he was kidding. He explained to myself and others that we had a boiler.  Every one of us had an oil heating component that heated the water. The only filter in the oil heater, was a fuel filter as well as he changed it every time he did maintenance on the oil heater. I didn’t know if I wanted to slap him for being cagey or laugh at him.