Buy RS-20 Refrigerant (R480A) | R134A Drop-In Replacement | 24 lb — Refrigerant Inc

RS-20 Refrigerant (R480A) — The Lowest-GWP Drop-In Replacement for R134A

RS-20, officially designated R480A by ASHRAE, is a refrigerant blend developed by Comstar International as the lowest global warming potential drop-in replacement for R134A currently available. With a GWP of just 290 — 80% lower than R134A's GWP of 1,430 — RS-20 allows automotive shops, commercial refrigeration operators, and fleet service centers to continue servicing existing R134A equipment with a dramatically more climate-friendly refrigerant, and with no hardware changes required. Refrigerant Inc stocks genuine RS-20 in 24 lb cylinders with free shipping to all 48 continental states.

What Makes RS-20 Different From Other R134A Replacements

RS-20 (R480A) is a unique blend of CO2, R1234ze, and R227ea — a non-flammable, non-ozone-depleting combination that delivers performance equivalent to R134A while achieving a GWP of 290. To put that in perspective:

• R134A GWP: 1,430
• R513A / R513B GWP: ~630 (common R134A alternatives)
• RS-20 (R480A) GWP: 290 — less than half of R513A/R513B and 80% below R134A
• R1234yf GWP: 4 (used in new vehicles, not a retrofit option for R134A systems)

For shops and operators who want the best available GWP reduction in existing R134A equipment without retrofitting to R1234yf, RS-20 is the strongest option on the market.

What Systems Use RS-20 (R480A)?

RS-20 is suitable as a drop-in replacement for R134A across a broad range of applications:

• Automotive AC — Vehicles manufactured between 1994 and approximately 2021 that use R134A
• Refrigerated transport — Reefer trailers and refrigerated vans running R134A
• Commercial refrigeration — Supermarket display cases, reach-in coolers, wine cellar coolers, vending machines, and dairy chillers using R134A
• Commercial and industrial AC — Chiller systems and close-control AC equipment charged with R134A
• Cold storage — Medium-temperature cold storage applications

Note: RS-20 is not recommended for systems with flooded evaporators. For all other R134A applications, it is a direct drop-in.

RS-20 Drop-In Advantages — No Hardware Changes Required

RS-20 was engineered specifically to minimize retrofit complexity:

• No hardware changes — Existing metering devices, expansion valves, and system components require no modification
• Same lubricant — RS-20 is fully compatible with the PAG oil used in automotive AC systems and POE oil used in commercial refrigeration — no oil change required
• Same charge weight — Recover the existing R134A charge, weigh it, and rechar