THF2B42T21
LX SERIES
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.
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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 |
|---|---|---|---|---|---|
XAFD48FBCN1+ furnace: Z8ES080C20LMPS1AHRI reference: 212485784 | 16.00 | 8.10 | 21000 | 2.22 | EPA 2476223 → |
XAHC48FBCN1+ furnace: Z8ET100C20LMPS1AHRI reference: 212415930 | 16.00 | 8.10 | 22200 | 2.36 | EPA 2476361 → |
XAFD48FBCN1+ furnace: Z8ES080C16LMPS1AHRI reference: 212478308 | 16.00 | 8.10 | 21200 | 2.24 | EPA 2476819 → |
XAHC48FBCN1+ furnace: Z8ES080C16LMPS1AHRI reference: 212483056 | 16.00 | 8.10 | 22200 | 2.38 | EPA 2476833 → |
XAHD48FBCN1+ furnace: Z8ET080C16LMPS1AHRI reference: 212416010 | 16.00 | 8.10 | 22200 | 2.38 | EPA 2476855 → |
XAFC48FXXN1+TXV+ furnace: Z8ET080C16LMPS1AHRI reference: 212416035 | 16.00 | 8.10 | 21000 | 2.24 | EPA 2476923 → |
XAFD48FBCN1+ furnace: Z8ES080C16SMPS1AHRI reference: 212416370 | 16.00 | 8.10 | 21200 | 2.24 | EPA 2476998 → |
XAHD48FBCN1+ furnace: Z8ES100C16LMPS1AHRI reference: 212478280 | 16.00 | 8.10 | 22200 | 2.36 | EPA 2477104 → |
XAHD48FBCN1+ furnace: Z8ES080C16SMPS1AHRI reference: 212416350 | 16.00 | 8.10 | 22200 | 2.38 | EPA 2477107 → |
XAHD48FBCN1+ furnace: Z8ES130D20SMPS1AHRI reference: 212416080 | 16.00 | 8.10 | 22000 | 2.38 | EPA 2477257 → |
XAHD48FBCN1+ furnace: Z8ES080C16LMPS1AHRI reference: 212475862 | 16.00 | 8.10 | 22200 | 2.38 | EPA 2477299 → |
XAFC48FBCN1+ furnace: Z8ES080C20SMPS1AHRI reference: 212416335 | 16.00 | 8.10 | 21000 | 2.22 | EPA 2477306 → |
XAFC48FBCN1+ furnace: Z8ET080C16LMPS1AHRI reference: 212416040 | 16.00 | 8.10 | 21000 | 2.24 | EPA 2477340 → |
XAHC48FBCN1+ furnace: Z8ES120C16LMPS1AHRI reference: 212482929 | 16.00 | 8.10 | 22400 | 2.36 | EPA 2477497 → |
XAHC48FBCN1+ furnace: Z8ES080B12LMPS1AHRI reference: 212485798 | 16.00 | 8.10 | 22000 | 2.34 | EPA 2477850 → |
XAFD48FBCN1+ furnace: Z8ET080C16LMPS1AHRI reference: 212416030 | 16.00 | 8.10 | 21000 | 2.24 | EPA 2477903 → |
XAHC48FBCN1+ furnace: Z8ES080B12SMPS1AHRI reference: 212416395 | 16.00 | 8.10 | 22000 | 2.34 | EPA 2478329 → |
XAHD48FBCN1+ furnace: Z8ES080C20LMPS1AHRI reference: 212478294 | 16.00 | 8.10 | 22200 | 2.36 | EPA 2478676 → |
XAHC48FBCN1+ furnace: Z8ES100B12LMPS1AHRI reference: 212475833 | 16.00 | 8.10 | 22200 | 2.34 | EPA 2479199 → |
XAHD48FBCN1+ furnace: Z8ET100C16LMPS1AHRI reference: 212415965 | 16.00 | 8.10 | 22000 | 2.36 | EPA 2479200 → |
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 →