Fit for Honeywell HPA300: The premium HPA300 HEPA replacement filter and activated carbon Pre-filter combo set
Compatible with Model: Honeywell HPA300 series air purifier models HPA300, HPA304, HPA8350 & HPA300VP. Compared to Part # HRF-R3.
Replacement Recycle: We recommend you to replace the HEPA filter every 6-12 months and pre filter every 2-3 months for optimal performance (depending upon your usage). It is fairly easy to install, no tools required. Simply remove and replace from your machine unit when needed.