I've done a Google and Yahoo search on freon gas but cannot find an answer. I have a heat pump that is located inside my condo closet. The compressor unit is outside on the roof. The unit was completely empty of freon. The seviceman found a fitting leak in the outside compressor. My question is: what happens if freon leaks from inside the house? Does it have long term effects like causing cancer? Can it be deadly like carbon monoxide? Or does it just dissipate into the air?