The benefits of regularly changing the heating and air-conditioning filters are obvious to homeowners; the real challenge is creating a system to make sure it gets done.
A reasonable schedule would be to replace it with a new one-inch pleated filter every 60-90 days. Households with shedding pets should consider replacing them every month. Some people change their filters every month when they pay their electric bills. A simple system would be to set a recurring appointment on your calendar like Outlook or Google.
Filters trap dust, mold and bacteria which can directly affect the air quality and play havoc with your allergies. When a filter is dirty, it prevents proper airflow and allows dust, dirt and allergens to blow through your home. Changing your filter regularly helps to avoid maintenance, improves equipment life and produces increased energy savings.
When shopping for filters, it’s understandable to look for the best bargain but the cheapest price may not be the best choice. When purchasing, recognize that HEPA-rated and HEPA-type filters are not the same thing. HEPA stands for high-efficiency particulate air. A HEPA filter meets or exceeds standards for efficiency set by the U.S. Department of Energy. Most HVAC contractors recommend HEPA filters.
Some filters need to be changed monthly and other types have manufacturer recommendations of every three months. An alternative to disposable filters are the permanent, washable types. These will cost more initially but because you can clean them and re-use them, eventually, you’ll recapture the cost and realize savings.