R-454B outdoor units
20 A2L outdoor units across 2 brands, each with the R-410A model it replaces and what its manufacturer publishes about keeping your indoor coil, your copper and your furnace.
Looking for the unit you already own rather than the one on the quote? Those are on the R-410A replacement pages.
American Standard
The American Standard swap rules, with sources →
| Model | Type | Tier | Compressor | Replaces | Data read |
|---|---|---|---|---|---|
| 5A6H4 | Heat pump | Silver 14 Heat Pump | single-stage | 4A6H4 | service bulletin only |
| 5A6H5 | Heat pump | Silver 15 | single-stage | 4A6H5 | service bulletin only |
Carrier
The Carrier swap rules, with sources →
| Model | Type | Tier | Compressor | Replaces | Data read |
|---|---|---|---|---|---|
| 26SCA4 | Air conditioner | Comfort | single-stage | 24SCA4, 24ABB3 | transition guide, spec sheet |
| 26SCA5 | Air conditioner | Comfort | single-stage | 24SCA5 | transition guide only |
| 26SPA6 | Air conditioner | Performance | single-stage | 24SPA6 | transition guide only |
| 26TPA8 | Air conditioner | Performance | two-stage | 24TP(A/B)7 | transition guide only |
| 26VNA1 | Air conditioner | Infinity | variable-speed | 24VNA9 | transition guide only |
| GA4SAN5 | Air conditioner | Builder | single-stage | GA4SAN4 | transition guide only |
| GA5SAN5 | Air conditioner | Builder | single-stage | GA5SAN4 | transition guide only |
| GA8TAN5 | Air conditioner | Builder | two-stage | GA7TAN4 | transition guide only |
| 27SCA5 | Heat pump | Comfort | single-stage | 25SCA5, 25HCE4 | transition guide only |
| 27SPA6 | Heat pump | Performance | single-stage | 25SPA5 | transition guide only |
| 27TPA8 | Heat pump | Performance | two-stage | 25TP(A,B)7 | transition guide only |
| 27VNA0 | Heat pump | Infinity | variable-speed | 25VNA8 | transition guide only |
| 27VNA1 | Heat pump | Infinity | variable-speed | — | transition guide only |
| 27VNA3 | Heat pump | Infinity | variable-speed | 25VNA4 | transition guide only |
| 37MUHAQ | Heat pump | Performance | variable-speed | 38MURAQ**AB3 | transition guide only |
| 37MURAQ | Heat pump | Comfort | variable-speed | 38MURAQ**AA3 | transition guide only |
| GH5SAN5 | Heat pump | Builder | single-stage | GH5SAN4 | transition guide only |
| GH8TAN5 | Heat pump | Builder | two-stage | GH7TAN4 | transition guide only |
This is a starting point, not an approval. Everything here is read from published manufacturer documents and dated, but only the licensed contractor who signs your installation can approve a specific system for your home and your local code. Take the citations on this page to them and ask.