Appliance Refrigerants Go 'Green'

Two major commercial HVAC players have teamed up to create a patented new green refrigerant: HCR188C1, claimed to be the first ever coolant to boast "zero global warming potential " along with a zero ozone-depletion rating.

The EPA and ASHRAE-approved mixture of ethane, butane, and propane will consume up to 48% less energy than traditional harmful hydro-fluorocarbon containing coolants.

The refrigerant also possesses properties that outperform R134a, a commonly used refrigerant today. Once approved as an alternative refrigerant, it's expected to be widely used in home freezers, refrigerators, and air-conditioning units according to the manufacturer.
http://www.hcr188c.com/

Seems like there is a defacto successor to sliced bread. Any thoughts?