Every refrigerant we support with ASHRAE safety class, GWP, common applications, replacement notes, and EPA phase-out status. For PT lookups, use the PT Chart.
| Refrigerant | Safety | GWP | Common use | Status | Replaces / replaced by |
|---|---|---|---|---|---|
| R-410A | A1 | 2,088 | Residential split AC, heat pumps (2010s–2024) | Phasing out | Replaced by R-32, R-454B |
| R-32 | A2L | 675 | Newer ductless mini-splits, residential AC | Current | R-410A replacement |
| R-454B | A2L | 466 | Residential AC and heat pumps (2025+) | Current | R-410A replacement (Carrier, Trane) |
| R-22 | A1 | 1,810 | Legacy residential AC (pre-2010) | Phased out 2020 | Recovery only — no new production |
| R-134a | A1 | 1,430 | Centrifugal chillers, transport refrigeration | Phasing down | Being replaced by R-1234yf (mobile), R-513A (chillers) |
| R-407C | A1 | 1,774 | R-22 retrofit blend | Niche | Bubble/dew temp glide — match to data plate |
| R-404A | A1 | 3,922 | Commercial refrigeration (legacy) | Phasing out | Replaced by R-448A, R-449A |
| R-448A / R-449A | A1 | ~1,400 | Supermarket low-/medium-temp refrigeration | Current | R-404A replacement |
| R-744 (CO₂) | A1 | 1 | Transcritical commercial refrigeration, heat pumps | Growing | High-side pressures 1,500+ psig — special training required |
| R-290 (Propane) | A3 | 3 | Self-contained small appliances | Niche | FLAMMABLE — strict charge limits (≤150 g typical) |
| R-1234yf | A2L | <1 | Mobile AC (automotive) | Current | R-134a replacement (cars, post-2017) |
ASHRAE 34 safety class. A1 = no flammability. A2L = mildly flammable, low burning velocity. A3 = highly flammable (propane). A2L equipment needs leak sensors + restricted ignition sources per UL 60335-2-40.
100-yr CO₂ equivalent. The 2020 AIM Act phases down high-GWP HFCs. New residential equipment as of 2025 must use a refrigerant with GWP < 700 (R-32 = 675, R-454B = 466).
Blends (R-410A, R-454B, R-407C) have a glide — bubble and dew are different temps at the same pressure. Charge by bubble for liquid subcool, dew for vapor superheat.
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