none
I was asked this question on the type 2 epa practice test and none wasn't an option so it cant be none.
What Ac refrigerant freon is required in 1989 BMW 7-Series? What Ac refrigerant freon is required in 1989 BMW 7-Series?
there are machines made specifically for recovering refrigerant. they are sold by HVAC wholesale distributors to contractors. federal law says that anyone handling refrigerant must be EPA certified. Contractors are the only ones who are certified because they take the required tests at wholesale distributor locations, as well as at industry associations or organizations. So, unless you are EPA certified....
R134A is the only approved refrigerant for automotive use.
134A refrigerant which can be purchased at WalMart or any Parts house.
R134a
r134
134a
A refrigerant recovery machine is required.
4.25 kg refrigerant required for 5 ton A/C
All Vehicles produced Post-1993 are required to utilize Refrigerant R134a.
r12
R134a