Would you change your auto air conditioning for lower fuel mileage?



N. Dakota State University

FARGO, N.D. — Repairing 2013 car air conditioning systems is going to get much more expensive, due to new Environmental Protection Agency policies that encourage the use of a new cooling refrigerant.

New policy

The EPA has developed this policy in an effort to reduce harmful greenhouse gas emissions that have been linked to global warming. When automotive air conditioning systems were introduced, Freon R-12 refrigerant was used for cooling.

However, R-12 is one of the most harmful greenhouse gases when released into the atmosphere, according to the EPA. In 1993, automobile manufacturers were required to convert to R-134a, which was viewed as an improvement.

Conversion kits were available for older automobiles, trucks, tractors and combines using R12. Now, the EPA has determined that R-134a also is a harmful emission and is trying to phase it out. However, the EPA is not dictating the use of the new refrigerant R-1234yf as it has done in the past.

Instead, the EPA is providing an incentive and encouraging adoption by giving credits to automobile manufactures for meeting the stricter Corporate Average Fuel Economy (CAFE) mileage standard of 35.5 miles per gallon.

In essence, car manufactures will be allowed to sell cars with poorer fuel mileage if they upgrade air conditioning systems to R-1234yf. It is all based on greenhouse gas (GHG) emissions, which are a priority of the Obama administration.

The administration believes GHG emission reductions will be greater with the new refrigerant than by burning less fuel and meeting the 2013 CAFE target. The switch to R-1234yf will not be cheap.

First, current wholesale prices for this new refrigerant hover around $45 per pound, which is 10 times the price of R-134a. In addition, R-1234yf is less efficient. To get the same level of cooling in automobiles, manufacturers will have to install a new device that will act as a heat exchanger to improve system performance.


The average cost per car is expected to be $100 per unit. Europe is ahead of the U.S. and already is requiring the new systems. However, the problem is that there only is one plant in China that is capable of producing R-1234yf. Once that plant becomes fully operational, supplies should increase and prices moderate a bit. Given the EPA’s emphasis on GHG emissions, the Obama administration could achieve the same outcome of lowering emissions if it required greater use of renewable energy instead of gasoline.


Present consumption of renewable motor fuel is about 15 percent. New, advanced biofuels have the potential to reduce GHG by 50 to 60 percent or more, so the proportion of renewable fuel required to be blended in cars for transportation would not be burdensome to consumers.

Moreover, many of the new, advanced biofuels have energy content equaling gasoline, so mileage would not suffer.

(The author is a biofuels economist at North Dakota State University.)


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  1. Fortunately motorists worldwide have another choice, one that is currently available, and has been safely and efficiently used for over 15 years by millions of satisfied customers.

    Hydrocarbon refrigerants, a blend of propane (R290) and iso-butane (R600a) are now very well established as a green cooling solution in mobile air-conditioning systems provided by many refrigerant producers, and that deliver improved efficiency and performance, especially in high ambient temperatures.

    It is for these reasons the the first Original Equipment Manufacturer (OEM) of vehicles, Australian based OKA Trucks has selected hydrocarbons for use in their production line for their highly advanced range of rugged vehicles designed for use in some of the most demanding conditions on the planet. Other larger OEMs are sure to follow their lead before long.

    The success of HCs in service markets world wide cannot be ignored any longer, and as much as the USEPA and fluorochemical manufacturers may not like it, there is no logical reason to continue to oppose the use of HCs in existing systems, and to deny the very substantial price and performance advantages this genuinely green cooling solution offers to consumers.

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