THF2B42T21
LX SERIES · source records, page 10
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.
Model patterns and component strings are preserved exactly. How to read model patterns and combinations →
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 |
|---|---|---|---|---|---|
XAFD60GBCN1+ furnace: Z8ET120C20LMPS1AHRI reference: 212594481 | 16.00 | 8.10 | 21200 | 2.26 | EPA 3991323 → |
XAFC60GBCN1+ furnace: Z8ET120C20LMPS1AHRI reference: 212594666 | 16.00 | 8.10 | 21200 | 2.24 | EPA 3991464 → |
XAFC60GBCN1+ furnace: Z8ET080C16LMPS1AHRI reference: 212594691 | 16.00 | 8.10 | 21000 | 2.28 | EPA 3991479 → |
XAFD60GXXN1+TXV+ furnace: Z8ET080C16LMPS1AHRI reference: 212594501 | 16.00 | 8.10 | 21000 | 2.28 | EPA 3991579 → |
XAFD60GBCN1+ furnace: Z8ET080C16LMPS1AHRI reference: 212594506 | 16.00 | 8.10 | 21000 | 2.28 | EPA 3991584 → |
XAFC60GBCN1+ furnace: Z8ES100C16SMPS1AHRI reference: 212488278 | 15.95 | 8.10 | 21000 | 2.28 | EPA 3990901 → |
XAFC60GBCN1+ furnace: Z8ES100C16LMPS1AHRI reference: 212488290 | 15.95 | 8.10 | 21000 | 2.28 | EPA 3990907 → |
XAFD48FBCN1+ furnace: Z8ES100C16LMPS1AHRI reference: 212485776 | 15.20 | 8.10 | 21000 | 2.22 | EPA 2476328 → |
XAFD48FBCN1+ furnace: Z8ES120C20LMPS1AHRI reference: 212485748 | 15.20 | 8.10 | 21200 | 2.20 | EPA 2476696 → |
XAFC48FBCN1+ furnace: Z8ES100C20LMPS1AHRI reference: 212482832 | 15.20 | 8.10 | 21000 | 2.22 | EPA 2476788 → |
XAFD48FBCN1+ furnace: Z9ET120D20SMPS1AHRI reference: 212415391 | 15.20 | 7.80 | 20800 | 2.18 | EPA 2477237 → |
XAFD48FBCN1+ furnace: Z8ES120C16LMPS1AHRI reference: 212478272 | 15.20 | 8.10 | 21000 | 2.24 | EPA 2477606 → |
XAFC48FXXN1+TXV+ furnace: Z8ES100C20LMPS1AHRI reference: 212482810 | 15.20 | 8.10 | 21000 | 2.22 | EPA 2477910 → |
XAFC48FXXN1+TXV+ furnace: Z8ES100B12LMPS1AHRI reference: 212482881 | 15.20 | 7.80 | 21200 | 2.20 | EPA 2477943 → |
XAFC48FBCN1+ furnace: Z8ET100C16LMPS1AHRI reference: 212415999 | 15.20 | 7.80 | 20600 | 2.18 | EPA 2478306 → |
XAFC48FBCN1+ furnace: Z8ES100B12LMPS1AHRI reference: 212482903 | 15.20 | 7.80 | 21200 | 2.20 | EPA 2478348 → |
XAFC48FBCN1+ furnace: Z8ES100C20SMPS1AHRI reference: 212416224 | 15.20 | 8.10 | 21000 | 2.22 | EPA 2478420 → |
XAFD48FBCN1+ furnace: Z8ES100C20SMPS1AHRI reference: 212416214 | 15.20 | 8.10 | 21000 | 2.22 | EPA 2478779 → |
XAHD48FBCN1+ furnace: Z9ET120D20SMPS1AHRI reference: 212415381 | 15.20 | 8.10 | 22600 | 2.32 | EPA 2479620 → |
XAFD48FBCN1+ furnace: Z9ES120D20SMPS1AHRI reference: 212415589 | 15.20 | 8.10 | 20800 | 2.24 | EPA 2481579 → |
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 →