Originally Posted by drtravel

My original question had more to do with the electronics of this device that might not make it through TSA screening or be allowed on the aircraft. Maybe it's just a lawyer's warning related to not turning on electronics until told it's OK.

I did a few checks on cabin air recirculation/refresh. It may depend on your definition of refresh. Various view are collected at: http://in.answers.yahoo.com/question...7205033AAArfK0