R-1234yf is a new refrigerant for automotive A/C systems that is being widely adopted by OEM’s such as BMW, Honda, Ford, and others worldwide.

But what is R-1234yf, and what is the cause of this industry shift?

Low-emission standards set by SAE and the environmental protection agency (EPA) have caused automotive manufacturers to search for low-emission refrigerants. R-1234yf has a lower charge and a 99.7% lower global warming potential (GWP) rating than its predeceasing refrigerant R-134a. This refrigerant is mildly flammable and requires the use of R-1234yf specific automotive A/C tools such as compressor oil, A/C leak detection injection adapters, and A/C recovery machines.

Important things to know about R-1234yf

Charge specifications:

R-134a: 24 Ounces

R-1234a: 21.16 Ounces

Global Warming Potential (GWP):

R-134a: 1430

R-1234yf: 4

R-1234yf is going to be significantly more expensive than R-134a

Technicians should be using R-1234yf PAG oil, as R-1234yf is slightly flammable and the oils contain additional additives to create a moisture resistant environment in mobile A/C systems

Technicians must be trained and certified by an EPA approved program to manage the new refrigerant

You cannot retrofit or “top off” R-134a with R-1234yf

Refrigerants should always be handled in well-ventilated areas and with systems designed to manage R-1234yf (ie. Refrigerant recovery systems).