Sunday, June 1, 2008


A.K.A Carbon Dioxide.

It is an alternative refrigerant being explored to replace R134a.

And here you thought R134 was benign.

European Union will phase out any refrigerant with a Global Warming Potential (GWP) of over 150 beginning 2011. R134a scores at 1,410, while Carbon Dioxide (R744) comes in with a score of 1 (one).

Unfortunately, Carbon Dioxide at 5% volume is toxic to humans.

Another refrigerant being considered is R152a with GWP level of 124.

Got this from Road & Track.