epa certs
In order to buy freon you need a license, therefore you shouldn't attempt to add freon. Call a contractor to service your unit.
you have to have an ozone depletion license to buy it now.
Obtain ASE certification in heating and AC systems.
The freon should be R12, Which requires a license to buy these days and is very expensive. You can buy a kit to convert it to R134 freon, You should check with your local auto parts store for prices
Home freon and R-12 freon for vehicles (yes) but not R134a freon which you can get at any autozone..................
R-422a and R-422b are both R-134 based chemicals and do not contain HCFC's or CFC's which means you do not have to have a license to buy it.
Wal-Mart do not have r22 freon, this is a false ad.
Short answer- you don't. You must be licensed and have special equipment to handle older freons. If you don't know how, you don't have the license, and you will not be allowed to buy the older Freon. BTW, the older Freons like R-12 are incredibly expensive.
If caught whoever is using the freon without a licence will get a fine from the EPA
On all years, makes and models you will need to go to any automotive a/c repair shop and have them reclaim this for you.... (Do not just let it out in the atmosphere this is illegal)....... Depending of if your have R-12 freon or R134A freon you can buy the R134a freon at any auto parts store but you need to be licensed to buy R-12 freon.........
i would not do it.. Epa requires to you have a license to purchase and use certain type of hfc and cfc freon