what are the best air purifiers?
['Our pick. Coway AP-1512HH Mighty. Effective, efficient, and inexpensive. ... ', 'Runner-up. Coway Airmega 200M. Different look, same great performance. ... ', 'Also great. Blueair Blue Pure 211+ A stellar performer for larger rooms. ... ', 'Budget pick. Blueair Blue Pure 411. Small, effective, and attractive. ... ', 'Also great. Austin Air HealthMate HM400.']