Buy RS-53 Refrigerant (R470A) | R410A Replacement | 24 lb — Refrigerant Inc

RS-53 Refrigerant (R470A) — R410A Replacement for Existing HVAC Systems

RS-53, officially designated R470A by ASHRAE, is a refrigerant blend developed by Comstar International as a retrofit replacement for R410A in existing residential and light commercial HVAC systems. As the industry transitions to lower-GWP refrigerants under EPA AIM Act regulations, RS-53 offers a pathway for servicing existing R410A equipment with a refrigerant that has a reduced environmental impact. Refrigerant Inc stocks genuine RS-53 in 24 lb cylinders with free shipping to all 48 continental states.

What Systems Use RS-53 (R470A)?

RS-53 is designed for existing R410A systems including:

• Residential split system air conditioners — Central AC systems installed between approximately 2010 and 2025 that use R410A
• Residential and light commercial heat pumps — Heat pump systems designed for R410A operating pressures
• Light commercial packaged units — Rooftop and packaged AC equipment running R410A
• Mini split systems — Some ductless systems originally charged with R410A

Important: RS-53 is a retrofit refrigerant for existing R410A systems. It is not intended for use in new equipment designed for R454B or other next-generation refrigerants. Always verify the equipment nameplate before servicing.

RS-53 vs. R410A — Key Considerations

• Lower GWP — RS-53 has a lower global warming potential than R410A (GWP 2,088), helping reduce environmental liability on existing equipment
• Compatible with R410A systems — Operating pressures and system compatibility are designed to be close to R410A, minimizing retrofit complexity
• Non-flammable (A1) — Standard service equipment compatible, no A2L tools required
• POE oil compatible — R410A systems already use POE lubricant, which is compatible with RS-53

RS-53 Retrofit Procedure

1. Recover all existing R410A from the system using an EPA-certified recovery machine
2. Inspect for and repair any leaks
3. Pull a deep vacuum (500 microns or lower)
4. Charge with RS-53 per Comstar's charge weight guidelines for the specific application
5. Verify operating pressures against RS-53 PT charts
6. Label the system with new refrigerant type, charge weight, and conversion date

RS-53 vs. R454B

RS-53 and R454B serve different purposes:

• RS-53 — A retrofit refrigerant for existing R410A systems; A1 (non-flammable); standard service equipment works fine
• R454B — The EPA-approved refrigerant for new HVAC equipment replacing R410A; A2L (mildly flammable); requires A2L-rated service equipment

If you're servicing existing R410A equipment and want to reduce its GWP without full system replacement, RS-53 is the practical option. For new equipment installs, use R454B.

Why Buy RS-53 From Refrigerant Inc

• Genuine Comstar Product — Factory-sealed RS-53 by Comstar International.
• Free Shipping to All 48 States — No freight fees added at checkout.
• Same or Next-Day Processing — Orders placed before 2PM EST ship the same day.
• Contractor & Wholesale Pricing — Volume accounts available. Call 888-593-7366.

Shipping Information

RS-53 ships via ground freight to all 48 continental states. Alaska and Hawaii excluded. Most orders ship within 1 business day. Transit time is typically 2–5 business days depending on location.

Frequently Asked Questions

Is RS-53 the same as R470A?
Yes. R470A is the official ASHRAE designation. RS-53 is Comstar's brand name for R470A. They are the same refrigerant.

Can RS-53 be used in new R454B equipment?
No. RS-53 is a retrofit refrigerant for existing R410A systems. New equipment manufactured for R454B is engineered specifically for that refrigerant and its A2L properties. Do not use RS-53 in equipment designed for R454B.

Do I need to change the oil when converting to RS-53?
R410A systems already use POE lubricant, which is compatible with RS-53. An oil change is generally not required for RS-53 retrofits from R410A.

Is RS-53 flammable?
RS-53 is classified A1 — non-flammable, low toxicity. Standard R410A service equipment is compatible. No A2L-rated tools are required, which is an advantage over R454B for contractors who haven't yet upgraded their equipment.

Why would I use RS-53 instead of just continuing to use R410A?
R410A supply will become more constrained and expensive as HFC phasedown regulations take effect and production declines. RS-53 offers a lower-GWP alternative for servicing existing R410A equipment as the market transitions — and it doesn't require the A2L safety precautions that R454B demands.