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The Honeywell 21500 HEPA filter has been replaced with the compatible Honeywell 21500 R and fits Honeywell models 50150, 51500, 83330, 61500, 11500 Series, 18150 Series, 11520 Series, and 17200 Series.
The Honeywell 21500 compatible is 99.97% effective at removing articles as small as .3 microns. It also collects dust, mold spores, mites, pet dander, and other allergens as well as removes harmful particles rather than displacing them.
This HEPA filter should be replaced every 3 years with regular usage. Dimensions: 14.4" x 14.7" x 6.6"
Also known as Enviracaire item number EV-15.