The United States Adopted The Controversial Refrigerant Gas HFO-1234yf

Contrary to Europe, which had gradually regulate force manufacturers to move refrigerant gas R134A to the HFO-1234yf for their air conditioning systems, the United States sees this passage occur more naturally. I must say they are encouraged by the Agency for Environmental Protection. In the United States, more and more manufacturers are moving from themselves,

For the gas conditioning system of their models, the traditional Tetrafluoroethane R134A to the new HFO-1234yf. However, it is ten times more expensive and considered more dangerous as highly flammable and very toxic. What particular Mercedes-Benz found during the crash tests that led to the burning of Class B because 1234yf. But I must say he also used them to comply with new environmental rules, especially those that will lead to an obligation to respect the Atlantic, from 2025, an average of 4.3 litres/100 km for their respective ranges. For this refrigerant developed by Honneywell and Dupont displays an index of global 4 against 1430 for the R134A, and is more energy efficient requiring less fuel and emit less greenhouse gas emissions during operation. Thus, as explained Automotive News, to be given "credits" from the EPA (Agency for Environmental Protection) to be able to exceed the standards. Thus models like the Cadillac XTS, Chevrolet Spark EV, Honda Fit (Jazz) EV, Chrysler 300, Dodge Charger and Challenger, Jeep Cherokee, Range Rover and Range Rover Sport are already switched to HFO-1234yf, despite the absence of specific regulation on the subject. 

Some manufacturers refuse this change

In Europe, regulation is more accurate. Since 1 January 2013, the restyled models can not use refrigerant gas showing a hint of warming above 150 (this will be the case for all new vehicles from 2017). So exit the R134A and place to majority HFO-1234yf even though some manufacturers refuse this change, and for security reasons, prefer to use CO2. This is the case of Volkswagen and Mercedes-Benz, it saw last summer a number of its models (Class A, B, CLA and SL) a refusal of registration in France because of it. The German manufacturer has finally won the case before the Council of State. Anyway and before any accident leading to a ban the era of HFO-1234yf seems underway in both Europe and the United States. Honneywell has already planned to invest 300 million dollars in its factories to boost production.