The 501 replacement filter has a rating of MERV 10. The sizes of the 501 replacement accordion style filter are approximately 3" x 26 1/2" x 6 1/8" collapsed and 16" x 27" x 6 1/8" expanded. The filter ships like a collapsed accordion and is expanded into a plastic frame within the air cleaner cabinet. This is the high efficiency filtering media that is the heart of your air cleaner. The filter media must be in good condition to assure the highest efficiency and trouble-free performance of your air cleaner.
For Best Results Heating & Cooling - Replace this filter every 6 to 12 months
To replace the filter, follow the directions on the box of the replacement media and check your owner’s manual for any additional routine maintenance that may be required.
This package ships with 2 filters.