In general, most air filter manufacturers and HVAC companies recommend changing your air filter every 90 days or 3 months. This may vary depending on the location of your home, if you have pets, and the age of your system and equipment. The ideal is to change your air filter every three months, however, there are certain factors to consider when determining when to replace an old filter. Depending on your lifestyle and the type of oven filter you choose, you may want to change it more often.
A number of factors need to be taken into account when deciding how often to change an oven filter, and many filter manufacturers suggest how often their product should be replaced. The general consensus among HVAC professionals is that you should replace your oven filter every 90 days or every three months. However, this depends on the thickness of the filter. Thicker filters have more room to collect dirt and dust, so there's no need to change them as often.
Thomas & Galbraith Heating, Cooling and Plumbing of Ohio recommends replacing filters that are less than 2 inches thick every 30 to 90 days. Three- or 4-inch filters can last 6 to 9 months, and filters up to 6 inches thick can be replaced once a year. During a remodeling project, change the oven filter every 30 days, or even more often, to prevent construction-related dust from circulating around the home. Regardless of the HVAC system you have, each unit needs a properly tuned quality filter to keep indoor air quality clean and your unit operating at peak efficiency.
If you live in a “smaller house”, your air conditioners and ovens need to pump less air for the same amount of temperature change, which could mean fewer filter changes. All the air that circulates through your HVAC system, whether for heating or cooling your home, will eventually pass through the air filter. In summer and winter peaks, air filters should be changed more frequently than necessary during the spring, fall, and milder months. Changing the air filters in your HVAC system is an essential practice that ensures that clean air circulates throughout your home. Larger homes have large volumes of air circulating around them, which means that the filter may need to be changed more frequently.
But how often do you need to change the air filter? How often do you need to change the oven filter? Well, it depends. To regulate the temperature of your home, the HVAC system draws air over the coils to heat or cool it, and then blows the warm air through the ducts to every room in your home. One of the most important things you can do on your own to take good care of your HVAC system is to simply change your air filter on a regular basis. A clean filter is necessary to prevent dust from passing through the HVAC system, where it can accumulate in the internal coils of the air conditioner and reduce the efficiency of the unit. Your oven owner's manual will specify the best MERV rating for your oven and, in general, filters with a MERV rating of 6 to 9 should be changed every 90 days, while those with a MERV rating of 10 to 12 should be changed every 60 days.
If you're a pet owner, you'll want to change your air filter every 2 months, especially when winter turns to spring and summer turns to fall. It's a general recommendation to change your home's air filter every 30 days when using less expensive fiberglass filters.