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REFRIGERANTS


Dropping in next T


John Poole of Refrigerant Solutions looks at some low GWP non-fl ammable retrofi t products to replace R410A, R407C, R134A, R404A and R448A/449A.


RS-20 has a GWP 80% lower than R134a, and less than half that of alternatives such as R513A & R513B, enabling


vehicle owners to maintain their air


conditioning systems until their vehicles are scrapped. RS-20 can be charged into an existing R134a system without


alterations to the equipment or changing the lubricant.


he European F Gas regulation, which is being followed by the UK Environment Agency and brought into UK law, aggressively phases down the use of


hydrofl uorocarbons (HFCs) based on their Global Warming Potentials (GWP). Quite simply the higher the GWP of a refrigerant the less can be used and thus sold. The regulation additionally limits the GWP of a product allowed for specifi c applications. Under the revised version regulation, the ultimate target is the total phaseout of HFCs in 2050. Refrigerant Solutions (RSL) has long been working to meet this regulatory challenge to the HVACR industry by developing non-fl ammable, low GWP replacements that can be retrofi tted into existing installations with few or no changes. The HVAC sector is mainly based on R410A and to a lesser


extent R407C, developed originally as early replacements for R22. But the R410A UK availability is now seriously reduced by GWP based-restrictions with the inevitable consequences for its price. To meet this challenge, RSL has developed RS-53 (R470A), a new non-fl ammable, low toxicity drop-in with a GWP less than half that of R410A. Importantly, it is the only replacement currently available for R410A in existing equipment.


Field trials in typical air conditioning units have demonstrated that RS-53 (R470A) has a similar performance to R410A. Its components are chemically stable and compatible with the materials and lubricants commonly found in R410A equipment. RS-53 (R470A) is therefore a new development in the quest to replace higher GWP refrigerants in both existing and new equipment. Performance Characteristics: ■Low direct GWP Drop-in replacement for R410A ■Similar energy effi ciency to R410A ■Close match for R410A in cooling capacity ■ Lower discharge pressure than R410A ■Similar discharge temperature to R410A ■No changes to hardware required during retrofi tting ■Compatible with lubricants commonly used with R410A ■ Replaces R410A in air conditioning and refrigeration applications


■Similar fl ow rate to R410A ■Zero ozone depletion potential ■Non-fl ammable & low toxicity.


14 March 2025 • www.acr-news.com


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