Rabbit Air BioGS 2.0 Filter Kit (for model SPA-550A and SPA-625A) Filter replacement kit includes one (1) BioGS HEPA Filter and one (1) Charcoal based Activated Carbon Filter for the BioGS 2.0 Ultra Quiet Air Purifier (SPA-550A and SPA-625A). The BioGS HEPA filter made of the most advanced fiber material which traps and reduces common allergens* and contaminants on the filter. (Greatly reduced Secondary Pollution through the HEPA filter which may be found in the conventional HEPA Air Cleaner.) Traps airborne allergens and contaminants down to 0.3 microns in size, 99.97% of the time. BioGS HEPA filter also alleviates many common household odors, Volatile Organic Compounds and household chemical smells. Up to 3 years based on 12 hour daily operation or every 18 months based on 24 hours of daily operation.