The Holmes H24 fits the following air purifier models:
The Holmes HAPF-24 HEPA Filter Replacement is an economical, compatible version of the genuine Holmes FitRite HAPF24 HEPA Filter. Also known as part number H24, this replacement filter features a built-in activated carbon pre-filter. The carbon pre-filter helps to reduce unpleasant household odors, while trapping large particles.
Holmes HAPF-24 HEPA Replacement specifications:
Depending on usage and air quality, replace your H24 HEPA filter every 6 to 12 months for optimum performance.