Improving the air quality of your HVAC system can be achieved through a few simple steps. First, you should regularly replace the air filter in your system. This will help to remove dust, dirt, and other airborne particles from the air. Additionally, you should have your HVAC system professionally serviced at least once a year to ensure that all components are functioning properly and that the system is free of any debris or blockages. Finally, you can install an air purifier to help remove any additional pollutants from the air. By following these steps, you can ensure that your HVAC system is providing you with the best air quality possible.