Is there any good way to improve home air quality?

My solution is to install a central air conditioner with purification function. The one I installed is Hisense 5G Honor Home, which is equipped with a nano water ion health module and is effective against formaldehyde, PM2.5, allergic substances, etc. It has a removal effect. In addition, you can also use it with a fresh air system, and the indoor oxygen content will be greatly improved.