THF2B42T21
LX SERIES · source records, page 11
460 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 460 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 | 460 / 460 |
| EER2 · BTU/Wh | 11.7–12 | 460 / 460 |
| HSPF2 · BTU/Wh | 7.8–8.1 | 460 / 460 |
| Cooling capacity · BTU/h | 39,500–42,000 | 460 / 460 |
| Heating capacity at 47°F / 8.3°C · BTU/h | 37,400–41,000 | 460 / 460 |
| Heating capacity at 17°F / −8.3°C · BTU/h | 24,200–26,600 | 460 / 460 |
| Heating capacity at 5°F / −15°C · BTU/h | 18,400–22,600 | 460 / 460 |
| COP at 5°F / −15°C | 1.98–2.42 | 460 / 460 |
| Equipment / loop type | HP - Split System | 460 / 460 |
| Refrigerant / source-reported GWP | R-410A (GWP:2088) | 460 / 460 |
| Compressor staging | Two-stage | 460 / 460 |
| Connected capability | No | 460 / 460 |
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 |
|---|---|---|---|---|---|
XAFC60GBCN1+ furnace: Z8ES100C16LMPS1AHRI reference: 212488284 | 15.95 | 8.10 | 21000 | 2.28 | EPA 3990905 → |
XAFD48FBCN1+ furnace: Z8ES120C16LMPS1AHRI reference: 212478266 | 15.20 | 8.10 | 21000 | 2.24 | EPA 2476278 → |
XAHC48FBCN1+ furnace: Z9ET100C16SMPS1AHRI reference: 212415452 | 15.20 | 7.80 | 21600 | 2.32 | EPA 2476619 → |
XAFC48FXXN1+TXV+ furnace: Z8ES080B12SMPS1AHRI reference: 212416400 | 15.20 | 8.10 | 20800 | 2.20 | EPA 2476991 → |
XAFC48FBCN1+ furnace: Z8ES100B12LMPS1AHRI reference: 212482885 | 15.20 | 7.80 | 21200 | 2.20 | EPA 2477145 → |
XAFC48FBCN1+ furnace: Z8ET100C16LMPS1AHRI reference: 212415995 | 15.20 | 7.80 | 20600 | 2.18 | EPA 2477171 → |
XAFC48FXXN1+TXV+ furnace: Z8ES100C20LMPS1AHRI reference: 212482789 | 15.20 | 8.10 | 21000 | 2.22 | EPA 2477223 → |
XAFC48FXXN1+TXV+ furnace: Z8ET100C16LMPS1AHRI reference: 212415990 | 15.20 | 8.10 | 20800 | 2.22 | EPA 2477226 → |
XAFD48FBCN1+ furnace: Z9ET120D20SMPS1AHRI reference: 212415387 | 15.20 | 7.80 | 20800 | 2.18 | EPA 2477238 → |
XAFC48FXXN1+TXV+ furnace: Z8ES100C16SMPS1AHRI reference: 212416260 | 15.20 | 8.10 | 21000 | 2.22 | EPA 2477283 → |
XAHC48FBCN1+ furnace: Z8ET100C16LMPS1AHRI reference: 212415975 | 15.20 | 7.80 | 21800 | 2.36 | EPA 2478402 → |
XAFD48FBCN1+ furnace: Z8ES120C20LMPS1AHRI reference: 212485742 | 15.20 | 8.10 | 21200 | 2.20 | EPA 2478764 → |
XAFC48FXXN1+TXV+ furnace: Z8ES100B12LMPS1AHRI reference: 212482860 | 15.20 | 7.80 | 21200 | 2.20 | EPA 2478805 → |
XAFC48FBCN1+ furnace: Z8ES100C20LMPS1AHRI reference: 212482814 | 15.20 | 8.10 | 21000 | 2.22 | EPA 2479516 → |
XAFD48FBCN1+ furnace: Z8ES100C16LMPS1AHRI reference: 212485770 | 15.20 | 8.10 | 21000 | 2.22 | EPA 2479971 → |
XAFD48FBCN1+ furnace: Z9ES120D20SMPS1AHRI reference: 212415583 | 15.20 | 8.10 | 20800 | 2.24 | EPA 2481578 → |
XAFD48FBCN1+ furnace: Z8ES120C16SMPS1AHRI reference: 212416165 | 15.20 | 8.10 | 21000 | 2.24 | EPA 2481677 → |
XAFC48FBCN1+ furnace: Z8ES080B12SMPS1AHRI reference: 212416405 | 15.20 | 8.10 | 20800 | 2.20 | EPA 2481841 → |
XAFC48FXXN1+TXV+ furnace: Z8ES100C16LMPS1AHRI reference: 212488629 | 15.20 | 8.10 | 21000 | 2.22 | EPA 2482912 → |
XAFC48FXXN1+TXV+ furnace: Z8ES120C20LMPS1AHRI reference: 212488596 | 15.20 | 7.80 | 21200 | 2.20 | EPA 2482921 → |
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 →