Vein: A blood vessel that carries blood that is low in oxygen content from the body back t... See the entire definition of Vein Viral: Of or pertaining to a virus.
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.
Evaporator Coil Leak = New Air Handler? I have a 9 year old Trane XE 1200 system. We have experienced small Freon leaks the last couple of years. We would have the system recharged and it would be fine for about 9 months. This year when the system was charged it leaked down in a couple of months.