MTL Cool said its new line of display cases using R-441A offers improved efficiency compared to units running on either R-134a or R-290 (propane), with test data showing that the first of this line, the new NRC2 system, runs on a 17 percent lower charge and requires 17 percent less energy compared to units running on R-290.

The global natural refrigerants market is forecast to reach $1.4 billion by 2020, growing at a compound annual growth rate (CAGR) of 11.5 percent between 2015 and 2020, according to a report published by MarketsandMarkets.

The global refrigerants market is forecast to reach $21 billion by 2020, growing at a compound annual growth rate (CAGR) of 6 percent from 2015 to 2020, according to a report published by MarketsandMarkets.

The EPA says a number of unapproved refrigerants with “22a” or “R-22a” in the name contain highly flammable hydrocarbons such as propane.