Forane® 427A (R-427A or FX-100), the Easy RetrofitTM, is a simplified and cost-effective retrofit solution for existing R-22 installations in a wide range of applications, including low and medium temperature refrigeration, air conditioning, chilling, and heat pump systems. Forane® 427A is the closest match to R-22 in terms of performances, mass flow rates, and operating pressures over the whole range of temperatures and has one of the lowest GWP among R-22 retrofit solutions. Forane® 427A is the only retrofit that can be used in equipment designed for R-22 without requiring any changes to the installation; there is no need to change the expansion valves, liquid lines, condensing units, or any other costly parts of your system. Forane® 427A is tolerant of mineral oil and alkylbenzene, so an oil change may not be required in retrofitting some installations, though a complete change to POE is always recommended to ensure reliable oil return and performance. Forane® 427A (R-427A) is a non-ozone depleting blend of HFC refrigerants R-32, R-125, R-143a, and R-134a.