The recently revised F-gas poses additional pressure for the HVAC&R industry to accelerate refrigerant transition. Not all applications can immediately adopt very low GWP refrigerants as these fluids tend to have mild or high flammability with installation and charge restrictions. Also retrofit solutions need to have similar thermodynamic properties to the incumbent refrigerant to ensure optimum performance and minimum downtime. These interim solutions allow existing systems to age gracefully for their remaining lifespan while new systems designed for very low GWP refrigerants are introduced to the market. To that end, Koura developed separate product solutions for retrofits and new systems. 

For retrofit, three refrigerants, R-456A, R-444A and R-473A, will be discu ...