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Professionals suggest through ventilation, source removal, or filtration systems.

For washable or electrostatic air conditioner filters, you can soak and rinse them with water. If you rinse the filter with water, make sure to use a faucet, shower head, or garden hose with a gentle water pressure setting, as strong water pressure could damage the filter.

But for disposable filters, water could ruin the filter, even allowing mold to grow in the filter. Instead, these filters should be replaced.

Air filters with a MERV rating of 11 or higher need to be changed every three to six months. If your filters are incredibly strained because of environmental factors, such as living in a smoggy, pollen-rich area with a large household, you may need to change your filters every two months regardless of the MERV rating.

As a general rule, HVAC air filters should be replaced every one to three months (or every 90 days). However, the ideal frequency depends on several factors, including the filter type and your home's environment. For instance, if you use thinner filters (1-2 inches deep), have pets, have household members with allergies, smoke indoors, or frequently keep windows open, you may need to change the filter as often as once a month. It's best to follow the manufacturer's recommendation as a guideline and visually inspect the filter monthly to see if it's dirty. Regular filter changes are crucial for maintaining proper airflow, good indoor air quality, and efficient HVAC system operation.