If you are looking to make the best air quality in your household there are a few things you can do.
The first is to have your household deep cleaned once a month by a professional cleaning service, and if you live in an section that has generally bad air quality, that method is not going to do a whole bit of good, so you would have to go to more extravagant and extreme measures.
And that would be to buy a whole household air purification system and have it become part of your central heating and air conditioner unit. It is a actually high and hefty investment to make, but a whole household air purification system can more or less combat and destroy all bad air quality that sits in your household due to outside interference from the bad air in general. I have a whole household air purification system because this is what my local section is. It is actually bad air quality most of the time. And with a whole household air purification system the air in my household is so clean you would know that you were residing in mountain fresh air! I am not kidding on that bit, however even with the ultra bad air quality outside. Because I have both the whole household air purification system and I also have good insulation, it works real well. And maybe every so often I do have my home deep cleaned and my carpets cleaned to help keep the good air quality rolling from the whole household air purification system.