Carrier 40MBQB18C Ductless Mini Split Filter - 2 Pack

Keep your ductless ceiling cassette system running at its best with this replacement filter designed for select Carrier and Bryant mini split indoor units. A clean filter ensures optimal airflow and helps maintain the air quality your system was built to deliver.

Filter Dimensions: 15-7/16" x 14-13/16"

Maintenance & Care

Carrier and Bryant recommend cleaning this ceiling cassette filter every two weeks using a vacuum with a soft-bristle brush attachment. In spaces with high traffic, smoke, or dust—such as restaurants, shops, garages, or homes with pets—filters may also be gently washed with mild soap and warm water. Always let filters dry completely out of direct sunlight before reinstalling.

⚠️ Never operate your mini split system without the filters installed. Keeping a backup set on hand makes it easier to stay on schedule with cleanings.

Replacement Guidance

Even though this filter is washable and reusable, its performance degrades over time. Depending on your environment and how consistently you clean it, the filter should be replaced every 2 to 3 years to keep your system operating efficiently and your air fresh.