My sister basically had to learn the hard way about things like air quality

Ever since my sister moved out on her own, she has been difficult to deal with.

She was always too used to our parents taking care of her in most situations.

She wasn’t even paying for her own clothes for the longest time, had to rely on Dad’s credit card. Well, finally, she was cut off and it was an important lesson for her in my opinion. Well, I have been trying to help her out since she got into her own apartment. I went with her to look at different apartments and she just wanted the cheapest one. I tried to tell her that it was important to test the heating and cooling systems so that she would be comfortable and to consider the air quality in the apartment as well. I even told her she should think about saving some money to buy an air purification system, but she laughed and said she would never be able to afford it. I explained that she at least had to change the air filters, and they should be quality ones, not cheap fiberglass air filters. She thought I was being a pain, but she went her own way with certain things. Some things, you just have to learn on your own. She started using cheap air filters with her HVAC. It was good that she at least knew to change the air filters, but the cheap ones are no good for air quality and hardly even protect the HVAC. When she was breathing in dust and debris in her apartment, she finally told me I was right that she needed better air filters.
Heating industry