In most cases, you should replace the filter at least every three months, even in summer. If you can't seem to remember to do it, a good rule of thumb is to change your oven filter every time the seasons change. The only way to ensure how often you need to change your air filter is to perform a visual inspection of the filter every month. After a few months, you'll get an idea of how quickly it gets dirty.
You'll need to reassess if you have a new pet or if the outdoor air quality has been poor. The ideal is to change your air filter every three months, however, there are certain factors to consider when determining when to change an old filter. In a large home, changing oven filters is done more frequently than in homes with only one or two occupants. Even in the warmer months of the year, you should regularly monitor the condition of your oven filter and replace it as needed to keep your family safe and your oven in good working order.
Outdoor air quality can have a big impact on how often the air filter becomes dirty and needs to be replaced. If the filter is dirty, the oven will not be able to circulate clean air throughout the house, which could put your health at risk. Thicker filters have more media available to capture contaminants, so a 5-inch filter requires less frequent changes than a 1-inch filter. Because filters with higher MERV ratings are denser, your oven must work harder to draw air through them and not all ovens are powerful enough to do so.
AllergiesIf someone in your household has allergies, they will benefit from more frequent air filter changes. If you live alone, without pets, and with good surrounding outdoor air quality, the manufacturer's filter change recommendations will likely work well for you. As a general rule to keep allergy sufferers as comfortable as possible, change the oven filter every 30 to 60 days. In short, your oven filter traps dirt, dust, allergens, and other contaminants, so they don't flow into (and don't inhale) your heating and cooling system.
Clogged filters not only negatively affect the air quality in a home, but also force the oven to work harder to draw air into the system and thus shorten the life of the oven. To ensure that only clean air comes out of your HVAC system, replace the air filter before it becomes clogged so that you can breathe better. More cycles mean more filter passes and opportunities to trap contaminants, so filters typically fill faster during periods of heavy use. Indoor air quality equipment, such as air purifiers and air filters, reduce the volume of pollutants, so there are fewer particles to capture by the oven filter.
In homes without this equipment, the oven filter is the only line of defense against contaminants in the air, so the filter fills up faster. The HVAC air filter helps keep indoor air clean by trapping mold particles, pollen, and other contaminants moving through the system. A number of factors need to be considered when deciding how often to change an oven filter, and many filter manufacturers recommend how often your product should be replaced.