THF2B42T21
LX SERIES
419 published source records · source checked Sep 21, 2026
Each efficiency range summarizes published EPA records for THF2B42T21. The highest SEER2 and HSPF2 may belong to different combinations. Open a source record below to see its ratings and the scope of its component information.
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Heating performance & equipment details
Ranges include the 419 published source records for this model. Values in different rows may describe different configurations. Open an individual record to compare values from the same test configuration.
| Reported field | Value / range | Records supplying it |
|---|---|---|
| SEER2 · BTU/Wh | 15.2–16 | 419 / 419 |
| EER2 · BTU/Wh | 11.7–12 | 419 / 419 |
| HSPF2 · BTU/Wh | 7.8–8.1 | 419 / 419 |
| Cooling capacity · BTU/h | 39,500–42,000 | 419 / 419 |
| Heating capacity at 47°F / 8.3°C · BTU/h | 37,400–41,000 | 419 / 419 |
| Heating capacity at 17°F / −8.3°C · BTU/h | 24,200–26,600 | 419 / 419 |
| Heating capacity at 5°F / −15°C · BTU/h | 18,400–22,600 | 419 / 419 |
| COP at 5°F / −15°C | 1.98–2.42 | 419 / 419 |
| Equipment / loop type | HP - Split System | 419 / 419 |
| Refrigerant / source-reported GWP | R-410A (GWP:2088) | 419 / 419 |
| Compressor staging | Two-stage | 419 / 419 |
| Connected capability | No | 419 / 419 |
47°F = 8.3°C; 17°F = −8.3°C; 5°F = −15°C. COP is dimensionless. These are reported rating points, not a prediction of a particular home’s heat demand or operating limit.
Matched systems
Each row is one source record. The component column distinguishes listed combinations from outdoor-model ratings without an indoor configuration.
| Indoor unit / required furnace | SEER2BTU/Wh | HSPF2BTU/Wh | Heating capacity at 5°F / −15°CBTU/h | COP at 5°F / −15°C | Record & comparison |
|---|---|---|---|---|---|
XAHC48FBCN1+ furnace: Z8ES080B12LMPS1AHRI reference: 212485804 | 16.00 | 8.10 | 22000 | 2.34 | EPA 2475878 → |
XAHD48FBCN1+ furnace: Z8ES080C16LMPS1AHRI reference: 212475874 | 16.00 | 8.10 | 22200 | 2.38 | EPA 2476435 → |
XAFD48FBCN1+ furnace: Z8ES080C20LMPS1AHRI reference: 212485790 | 16.00 | 8.10 | 21000 | 2.22 | EPA 2476505 → |
XAHD48FBCN1+ furnace: Z8ET080C16LMPS1AHRI reference: 212416014 | 16.00 | 8.10 | 22200 | 2.38 | EPA 2476830 → |
XAFD48FBCN1+ furnace: Z8ES080C16LMPS1AHRI reference: 212478314 | 16.00 | 8.10 | 21200 | 2.24 | EPA 2476879 → |
XAHC48FBCN1+ furnace: Z8ET080C16LMPS1AHRI reference: 212416024 | 16.00 | 8.10 | 22200 | 2.38 | EPA 2476932 → |
XAFC48FXXN1+TXV+ furnace: Z8ET120C20LMPS1AHRI reference: 212415904 | 16.00 | 8.10 | 20800 | 2.22 | EPA 2477006 → |
XAHD48FBCN1+ furnace: Z8ES080C16SMPS1AHRI reference: 212416354 | 16.00 | 8.10 | 22200 | 2.38 | EPA 2477007 → |
XAFC48FXXN1+TXV+ furnace: Z8ES080C16SMPS1AHRI reference: 212416379 | 16.00 | 8.10 | 21200 | 2.24 | EPA 2477141 → |
XAFD48FBCN1+ furnace: Z8ET080C16LMPS1AHRI reference: 212416034 | 16.00 | 8.10 | 21000 | 2.24 | EPA 2477254 → |
XAFC48FXXN1+TXV+ furnace: Z8ES120C16SMPS1AHRI reference: 212416174 | 16.00 | 8.10 | 21400 | 2.22 | EPA 2477296 → |
XAHC48FBCN1+ furnace: Z8ES120C16LMPS1AHRI reference: 212482950 | 16.00 | 8.10 | 22400 | 2.36 | EPA 2477455 → |
XAFC48FXXN1+TXV+ furnace: Z8ES080C20SMPS1AHRI reference: 212416334 | 16.00 | 8.10 | 21000 | 2.22 | EPA 2477549 → |
XAHD48FBCN1+ furnace: Z8ES100C20LMPS1AHRI reference: 212485762 | 16.00 | 8.10 | 22200 | 2.36 | EPA 2477901 → |
XAFD48FBCN1+ furnace: Z8ES080C20SMPS1AHRI reference: 212416329 | 16.00 | 8.10 | 21000 | 2.22 | EPA 2477990 → |
XAHD48FBCN1+ furnace: Z8ES100C16LMPS1AHRI reference: 212478286 | 16.00 | 8.10 | 22200 | 2.36 | EPA 2477999 → |
XAFD48FBCN1+ furnace: Z8ET100C16LMPS1AHRI reference: 212415989 | 16.00 | 8.10 | 20800 | 2.22 | EPA 2478003 → |
XAFC48FBCN1+ furnace: Z8ET120C20LMPS1AHRI reference: 212415909 | 16.00 | 8.10 | 20800 | 2.22 | EPA 2478333 → |
XAHD48FBCN1+ furnace: Z8ES080C20LMPS1AHRI reference: 212478300 | 16.00 | 8.10 | 22200 | 2.36 | EPA 2479131 → |
XAHC48FBCN1+ furnace: Z8ES080C16SMPS1AHRI reference: 212416364 | 16.00 | 8.10 | 22200 | 2.38 | EPA 2479228 → |
Sources and documentation
The table uses public EPA ENERGY STAR data. AHRI references are reported by EPA and have not been independently checked with AHRI. Source records do not establish availability, installation suitability or rebate eligibility.
No manufacturer manual has been matched to this model.
Collection method, revision history and known limitations →