The Montreal Protocol took effect on August 26th 1989 and was designed to protect the ozone layer by phasing out ozone layer destroying substances by the year 2020. Among one of the substances was r22 or more commonly know as freon. This was at the time being used in almost all home AC systems and if you had a home built in the 90’s, you most like had an r22 system in it. After 2020, it will be much harder and more expensive to obtain r22 to replenish systems that have leaks or need a recharge and only recycled r22 will be available. So, it is easy to see that in a matter of years, the stock of r22 available will be practically non-existent.
This means that if you need to service an older AC unit, then the cost of doing so is going to increase as the years go by. This is why buying a new AC unit now can not only save you money on your electric bill because it is more efficient, it will also save you money should you ever need to recharge the coolant levels.
R410a is the new replacement coolant and easily obtained so the cost is no way near what the old freon will cost you. If your system was built after 2010, it probably already is using the new coolant.
You can check if your system is the newer type by looking at the nameplate on the condenser which will tell you what is being used.
The law doesn’t say you must replace your AC system that uses R22, but as the cost of freon continues to go up, it will make more economic sense to do so.
You can quickly find out what a new central air system will cost here: New Central Air Quote
And finally, by using the new coolant in your AC system, you will be helping the environment and help save the ozone layer which keeps us all safe from harmful UV rays.