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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.
Regulation of Freon in HVAC Units. 1  Any owner of cooling equipment which uses more than 50lbs of freon must repair all found leaks within 30 days of notice. Exceptions to this rule do exist and can be found on the Environmental Protection Agency website.