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They do work. Try the Living Air Classic. It is used in most restaurants, including Ryan's Steak Houses that are 11,000 s.f. I use one in my basement bar and one upstairs. The upstairs unit cleans both upper levels of over 3,000 s.f. The basement one handles cigar smoke. He He He!
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"Sometimes a cigar is just a cigar."
- Sigmund Freud
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