How does the Filtrete filter compare with electronic air cleaners?
The efficiency of 3M filters approaches that of the top-of-the-line electronic air cleaners. The best electronic air cleaners are effective in capturing particles down to 0.1 microns while the Filtrete Ultra Allergen Reduction Filter is effective down to 0.3 microns. Some tests indicate that in the large particle size (range 1.0-10 microns) the Filtrete Filter is more effective. Top electronic units cost $500 – $800 and require monthly maintenance.
