This replacement filter 2-pack is designed for Carrier 40MAQB series mini split wall-mounted indoor units. Clean filters are essential to keeping your system running efficiently and helping maintain healthy indoor air quality in your home or workspace.
Guaranteed to fit the following indoor unit models: Carrier 40MAQB12, 40MAQB12B–102, 40MAQB12B–121, 40MAQB12B–131, 40MAQB12B–302, 40MAQB12B–321, and 40MAQB12B–331.
Filter Dimensions: 12-13/16″ x 13-1/8″
Maintenance & Care
Vacuum filters every two weeks using a soft-bristle brush attachment. For heavy-use environments—homes with pets, indoor smoking, or high dust—you may gently wash filters with mild soapy water. Dry fully in the shade before reinstalling.
⚠️ Note: Never run your system without the filters installed. A second set helps ensure uninterrupted operation during cleaning cycles.
Replacement Guidance
Even though washable, filters lose efficiency over time. Replace every 12 to 24 months depending on use and environment.
