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This means that breathing low concentrations of freon from a leaking refrigerator or air conditioner over a long period of time is unlikely to have a cumulative effect, and thus few, if any, long term health effects.
Causes. If you move or transport an old freezer, the Freon container can puncture and release gas. Most freezers that were manufactured before 1995 contain Freon. If you suspect that your freezer is older than 1995, be cautious of Freon.