True HEPA Filters are capable of capturing up to 99.97% of particles as small as 0.3 microns, and the Airpura R600, UV600, P600, V600, and H600 air purifiers utilize the RpH600RVHU replacement HEPA Filter. This filter features over 40 square of filtration surface with 1� deep folds, and lasts up to 5 years depending on use.