R134a vs R1234yf: What BC Vehicle Owners Need to Know

Most vehicles on Canadian roads today use one of two automotive refrigerants: R134a or R1234yf. They are chemically different, have different environmental profiles, use different fittings, and require different service equipment. Mixing them is illegal under Canadian environmental regulations and will damage an A/C system.

R134a (tetrafluoroethane) replaced R12 in the mid-1990s under the Montreal Protocol as an ozone-friendly refrigerant. It became the universal automotive refrigerant for roughly two decades. If your vehicle is a 2014 or earlier model year, it almost certainly uses R134a.

R134a is still legally sold and serviced in Canada. It is produced, readily available through certified refrigerant handlers, and the equipment to service it is mature and widely distributed. However, R134a has a high global warming potential (GWP) — roughly 1,430 times that of CO₂. That is why the automotive industry transitioned away from it.

R1234yf (2,3,3,3-tetrafluoropropene) has a GWP of roughly 4 — more than 300 times lower than R134a. Since about 2013 in Europe and 2017 in North America, new vehicles have been migrating to R1234yf. By 2021, virtually every new vehicle sold in Canada used R1234yf.

R1234yf uses different service fittings (the high- and low-side ports are physically different sizes) to prevent cross-contamination with R134a. Its charge weights are often different, its operating pressures differ, and the dedicated refrigerant costs significantly more per pound than R134a.

Open your hood. Somewhere near the front of the engine bay, there is an A/C service label (usually on the radiator support, under the hood liner, or on the compressor itself). The label will specify the refrigerant type — "HFC-134a" or "R-1234yf" — and the factory charge weight in grams.

As a rough rule for passenger cars: 2014 and earlier — R134a. 2015–2017 — could be either, depending on make and model. 2018 and newer — almost certainly R1234yf. But always verify with the underhood label. JANTECH verifies this before any service is performed on your vehicle.

Not every mobile A/C service or repair shop is equipped for R1234yf. The refrigerant itself is expensive, the dedicated recovery and charging equipment is an additional capital investment, and handling it requires current HRAI certification. If you own a 2018 or newer vehicle, confirm that the service provider has R1234yf capability before booking.

JANTECH carries both R134a and R1234yf, and has the dedicated equipment and certification for each. Pricing for refrigerant is billed at market value — R1234yf currently runs several times the per-gram cost of R134a due to global supply.