How Often Should You Replace Your Merv 13 Filter?

For Merv 8, 11 and 13 filters, it is recommended to change the filter at least every 3 months for better filtration and healthier air in your home. However, during spring and fall, the filter usually doesn't get as dirty so you can get by without changing it as often. In a home that doesn't have a lot of infiltration or duct leaks and an overall low level of dust, the filter can stay clean longer even when used a lot (unless the return vents are on the floor).Our MERV 3 air filters of 1, 2 and 4 are designed to last approximately 3 months, while our MERV 13 replacement filters for the whole house must be replaced every 6 months. If you have pets, children, or people with allergies in your space, it is recommended to change your filters more frequently.

It is important to replace filters regularly, because the older an air filter is, the less bacteria and dirt it removes from the air, which will worsen indoor air quality and increase energy costs. Filters that normally last 90 days should be changed every 30 days during the peak summer and winter months. Using an air filter with a MERV rating higher than recommended by the boiler or air conditioner manufacturer may affect its performance. MERV ratings range from 1 to 20; the higher the number, the greater the percentage of contaminants blocked by the filter. Naturally, if your home's air quality isn't good, you'll need to replace your air filters more often. To ensure that your family is safe from germs and other potentially harmful air particles, you should replace the filter more often.

But how often should you change your oven filter? Well, it depends. It is important to note that there are high-efficiency filters that are designed to filter out small bacterial, moldy and fungal particles, but standard MERV 8-11 filters only block the largest particles of dust, dirt to 26% of hair. If you have poor outdoor air quality or pets indoors, you'll need to change your air filter more often. Because filters with higher MERV values are denser, your oven must work harder to suck air through them and not all ovens are powerful enough to do so. Marking the calendar every 90 days or trying to remember the last time you changed your filter can be a challenge, so many oven manufacturers recommend replacing them at the start of each new season.

To keep air quality under control and your home clean, you'll want to replace the filter at least 2 to 3 months apart. A number of factors must be considered when deciding how often an oven filter should be changed, and many filter manufacturers recommend how often their product should be replaced. Air filters usually have a MERV (minimum efficiency report value) that determines the type and size of contaminants against which the filter will operate.

Clint Bouyer
Clint Bouyer

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