How to clean: Air purifier. Before cleaning, turn the air purifier off and unplug it. On the outside of the air purifier, use a soft, dirt-free, dampened cloth for cleaning. The air inlet and outlet grills can be cleaned with a small dry, soft brush.

3M Filtrete™ Brand is a premiere 3M Brand helping improve indoor air quality for your family. For nearly 25 years, Filtrete™ Filters have delivered cleaner air to millions of homes, becoming a leader in residential air filtration. As a result, Filtrete is the most trusted filter brand in America*.

Filter media is a mix of fiber and air, and it's often pleated. In fact, Filtrete™ Filter media is less than 15 percent fiber; the rest is air. This very low density allows air to easily flow through the media.

Read the manufacturer's instructions for your purifier model, but in general, the following is a reliable schedule based on filter types.

1. Carbon Filters: Replace every three months.
2. HEPA Filters: Replace every 12 to 18 months.
3. Permanent Filters: Clean every three months; replace when appears worn or damaged.

The filter is not "permanent" and needs replacing periodically, this is a good thing, as the washable filter does not trap particles as small as nonwashable ones. Unless you are in a really polluted area, the blue layer will filter well for a lot longer than the point where the app tells you to replace it.

Filtrete Air Filters imply that they are as good as air purifiers but are not in the same category or performance arena. Filtrete air filters are built to work with homes equipped with forced-air heating and cooling systems. Simply put, Filtrete is not the best choice for your home and the air quality inside of it.

The best HVAC filters: Reviews & Recommendations

• Best overall: Aerostar 20x25x1 MERV 13 Pleated Air Filter.
• Best for pets: Colorfil 20x25x1 MERV 8 Air Filter.
• Best for odors: Flanders 16x16x1 NaturalAire with Baking Soda.
• Best for allergies: AIRx Filters Allergy 20x25x1 MERV 11 Pleated Air Filter.

Yes. If you would like to enjoy improved air quality, then running your air purifier during the night is highly recommended. Pollutants and allergens are still around during the night time, so filtering them out of your air on a continuous basis is ideal.

Absolutely! It's advised to keep your air purifier turned on all day and night, even when you're sleeping or not at home. Many people think that switching it off during the night or when they're not present is a logical energy-saving measure, but it is recommended to keep it running constantly.

Air filters capture lint, dust, smoke, mold, pollen, pet dander, bacteria, and other things, allowing for a healthier indoor environment. Clean filters keep the air you breathe cleaner. When the air filters become clogged and dirty, they begin to allow dust and debris through the ventilation system into your home.

every 6–12 months Xiaomi Smart Air Purifier 4 Filter - Xiaomi Global. It is recommended to replace the filter every 6–12 months.

True HEPA filters True HEPA filters are even more effective, with 99.97% efficiency rate at capturing particles as small as 0.3 microns. True HEPA filters are great to prevent mold, pollen, bacteria, and viruses from infecting your home's air. These microbes can cause many respiratory problems and viral infections.