Ever thought about having your ducts cleaned?
This is a before and after taken on-site at a job here in Springfield, MO performed by Queen City Heating & Cooling.
It is an important thing to have done to keep a home’s air quality in a healthy state, as you can see in the picture dust builds up most heavily in the returns. You can keep a very clean home and still have a thick unhealthy coating of dust hanging out in your ducts.