Your Guide to Mitsubishi Mini-Split Filters

Mitsubishi’s standard main filters are washable mesh screens that catch dust and lint before they reach the indoor unit’s coil and fan. Clean them every two weeks. Regular cleaning wears them out over time, so replace every 1 to 3 years based on wear. We recommend once a year.

A washable main filter with a three-dimensional surface treated with platinum-ceramic particles. Mitsubishi describes it as capturing fine dust better than a flat screen and providing deodorizing and antibacterial effects inside the indoor unit. Replace every 1 to 3 years based on wear. We recommend once a year.

A washable mesh main filter with an anti-mold treatment that captures dust and lint before they reach the coil and fan. A good fit for humid rooms. Replace every 1 to 3 years based on wear. We recommend once a year.

A washable main filter treated with catechin, a compound found in green tea that Mitsubishi describes as deodorizing and antibacterial. It’s a legacy Mitsubishi design that’s still available. The treatment wears out with use and cleaning, so replace it every 12 months even if it looks clean.

Mitsubishi describes its enzyme treatment as breaking down allergen proteins and helping capture fine dust, pollen and bacteria that pass through the main filter. Mitsubishi’s guidance is to replace it once a year, but not every indoor air environment is the same. Replace it more often in homes with pets, smokers, wildfire smoke, high pollen or heavy dust.

Mitsubishi’s electrostatic version adds a charged layer that Mitsubishi says helps capture fine particles, along with the enzyme treatment. Replacement guidance is the same as the standard anti-allergy filter.

A disposable secondary filter designed to reduce odors from the indoor unit and the room around it. Don’t wash it. Replace every 12 months, or sooner in homes with pets, wall-to-wall carpet, or outside odors from traffic or industry.