Is your air conditioner bringing in dirty outside air? 2013-08-242020-07-15 Thomas Talhelm Air Pollution Reviews Is your air conditioner bringing in dirty outside air? Here’s a live test with a particle counter. See the average results over multiple AC tests here. It's Time to Breathe SafeJoin the thousands already protecting their health. Download your free guide to breathing safe today. Top Picks Does AC Bring in Outdoor Air Pollution? What Combination of Air Filters Do I Need to Protect Against Everything? Does the Air Conditioner Bring in Dirty Air From Outside? Q&A: Do ACs Bring in More Dirty Air?