The SHARK " Never Change Air Purifier Max" (Model: HP302) with adjustable odor neutralizer technology, 4-layers of filtration system (high performance nanoseal HEPA, activated carbon, medium particle and debris defense) efficiently self adjusts its fan speed based on the air's pollution level while still running insanely quiet. Furthermore, the unit did an excellent job clearing the air while doing frying - not only in the kitchen area but also the adjacent dining room, responding in real-time and automatically reacting to prodigiously purify pollutants and odors in minutes. Bottom line, the stunningly aesthetic Shark Never Change Air Purifier Max does a phenomenal purification of indoor pollutants and odors.