What is the best air filtration/purification system for a 1 bedroom apt. in Brooklyn? [more inside]
posted by airguitar2 on Dec 18, 2009 - 11 answers

How can I make the air in my office more breathable? HEPA filter, activated charcoal, or both? Brand/model recommendations? [more inside]
posted by lakeroon on Nov 4, 2009 - 6 answers

Have you ever encountered an activated carbon air filter that actually removed odors, leaving the output air clean? Which one? [more inside]
posted by Nish ton on Nov 4, 2009 - 11 answers

With some products, the off-brand is as good as any other brand, sometimes even coming off the same production lines in the same factories. With other products, there is a quality difference between brands. How about for replacement HEPA filters for a Kenmore air cleaner? (And, as a bonus, should I believe the warning against washing and reusing the charcoal pre-filters?) [more inside]
posted by daisyace on Oct 30, 2008 - 4 answers

Do I really need two air filters for my heater? [more inside]
posted by the ghost of Ken Lay on Oct 26, 2007 - 3 answers