Air filters need to be replaced every 3 months depending on the thickness. If you have pets inside your house, it is highly recommended that you replace them after 90 days to ensure the air quality at home.
Air filters filter the air you breathe. They block dust, molds, pollen, and other debris. Aside from cleaning the air, you breathe, it also prevents your AC unit from possible damage due to dust accumulation.
Air filters improve your indoor air quality. Imagine yourself living in the city and breathing the air filled with smog, dust, and smoke. This is where air filters create a huge difference. It filters the air you breathe so you will avoid contracting respiratory diseases.