HFO-1234yf
A New Low GWP Refrigerant
The optimal balance of safety
and sustainability.

HFO-1234yf Performance Facts

The information in this web site summarizes how HFO-1234yf supports new game-changing environmental regulations (the European Union MAC Directive) designed to reduce the climate impact of air conditioning in cars sold in the European Union (EU). This site also provides background including conclusions from years of evaluation of the new product, HFO-1234yf. This site is for anyone interested in learning the facts.
HFO-1234yf Enables Reduced Climate Impact of Air Conditioning for Cars
DuPont has long been on a journey to deliver more sustainable product solutions that are easier on the planet without sacrificing performance. And when the European Commission challenged the industry to develop a product to meet the requirements of the MAC Directive (legislation that called for new automobiles to use a refrigerant with a Global Warming Potential less than 150), DuPont went to work. We co-developed HFO-1234yf, a new more environmentally sustainable refrigerant for automobiles that has a 99.7% better GWP score than the currently used refrigerant.

Global Warming Potential Comparison ChartThe Global Warming Potential of HFO-1234yf is 4. That is 99.7% less than current refrigerants! 
Why Did the EU Establish the MAC Directive to Combat Global Warming?
The European Union has been a global leader in setting sustainability standards, including actions to fight climate change.  In 2006, the EU adopted the Mobile Air Conditioning (MAC) Directive that would reduce the climate impact of air conditioning in cars sold in the EU.  The MAC Directive requires an automotive refrigerant with a GWP of less than 150 for use in new model vehicle platforms.  This requirement is scheduled to go into force on January 1, 2013.

In a 2007 presentation(1) on the MAC Directive, a representative of the European Commission referred to climate change as “the greatest environmental and economic challenge facing humanity.”  Action on climate change is a priority of the EU’s Sustainable Development Strategy, and the MAC Directive is a central program in this effort.  While compliance with this regulation involves some additional cost to automakers, failure to maintain the MAC Directive would come at a much higher cost to the environment and society as a whole.
HFO-1234yf—Environmental Benefits
DuPont believes HFO-1234yf will make an important contribution to a reduced environmental footprint for automobiles. If adopted in all new cars sold in the EU, North America, and Japan, every year those cars would have reduced emissions equivalent to using 2.3 to 4.9 billion fewer liters of fuel or driving 24 to 52 billion fewer kilometers.(2) (This is equivalent to using 600 million to 1.3 billion fewer gallons of fuel or driving 15 to 32 billion fewer miles.)

When comparing HFO-1234yf and CO2 as an automotive refrigerant, HFO-1234yf has very distinct benefits with regard to fuel efficiency and overall sustainability. CO2 would require a much larger, heavier air conditioning system than what is used in most cars today, which is contrary to the trend toward smaller, more fuel-efficient, sustainable cars. Lifecycle climate performance evaluations have also concluded that CO2 is not as efficient as HFO-1234yf in warmer climates, and would therefore contribute considerably more overall to total greenhouse gas emissions, and even more so as the projected vehicle sales volume in warmer, developing countries such as India and China continues to increase.

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  1. http://ec.europa.eu/enterprise/sectors/automotive/files/mac_presentation_en.pdf 
  2. Based on 2017 projected vehicle sales and assuming 10.63 kilometers per liter (25 miles per gallon)
Global Evaluations
Daimler Testing