The first step to improving your air quality is to prevent unwanted air from entering your home. To do this, seal your duct system. Then you can focus on either cleaning your existing system or installing a more efficient air filtration system. 

Once again, the most effective, but most expensive solution is to replace your furnace with a newer, more efficient furnace. Modern high-efficiency furnaces could save you 25% on your energy bills, which means the expense of purchasing a new furnace should pay for itself fairly quickly. 

It varies depending on the type of filter you have. If you have cheaper, disposable filters, we recommend changing them every 30 days. If you have pleated, or poly, filters, we recommend changing them every 90 days. Media filters or CleanEffects filters can last a little longer and should be replaced about once a year.

Proper air filtration is crucial to the health of both your HVAC system and your family. Air filters prevent dust and dirt from building up in your system to keep it performing at its best. High-efficiency filters do a better job of this and remove dust, dirt, mold, and more from the air. This is especially useful if you have allergies or respiratory issues. High-efficiency filters are better, but not 100% necessary. Whether or not you choose to use them, remember to change your filters regularly.