No, refrigerant never wheres out. It should last forever. If you need a boast it is because the unit lost its charge through a leak.
Maybe you need a freon boost.
There is no need to ever change the refrigerant which is R134 and not Freon R12.
If the refrigerant has leaked out, then you can not do a home repair. you need to replace all the pipework and get someone to come in and re pressurise the system. This is a job for a professional.
R134a freon...................
It depends on what kind of freon you need.
If there are no leaks, it would not need recharged.If there are no leaks, it would not need recharged.
Freon does not generally need to be replaced. However over time, systems sometimes have a small leak and need to have coolant added. A Freon gauge can confirm if you need to have Freon added.
Yes you need freon if you own a heatpump, with a furnace/oil burner you could do without the freon.
The amount of Freon you will need to recharge your air conditioning system is dependent upon how low the Freon level is. You should begin with a one pound bottle of Freon.
Home freon and R-12 freon for vehicles (yes) but not R134a freon which you can get at any autozone..................
If you are talking about removing the freon in the a/c system then you will need a freon reclaimer.............
you can put together ostrich celery, strawberries, and oat flour. Prep cheese pizza then cook it. You need the best refrigerator to do this though.