oGeee HEPA Replacement Filter for Coway AP1512HH Air Purifiers (5) Fit Model: For Coway AP1512HH. Captures up to 99.97% of airborne particles at 0.3 microns Design for removing allergens, asthma and working fine with other prefilter, carbon filter. For best performance replace once per year,depend on degree of contamination of the surrounding.