Lennox / AIR-SOURCE HEAT PUMP

EL21KLV-024-230A**

Elite EL21KLV SERIES

174 published source records · source checked Sep 21, 2026

SEER2 range15.2–21BTU/Wh
HSPF2 range8.1–10.2BTU/Wh
Cooling capacity21,600–24,000BTU/h

Each efficiency range summarizes published EPA records for EL21KLV-024-230A**. 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 174 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 fieldValue / rangeRecords supplying it
SEER2 · BTU/Wh15.2–21174 / 174
EER2 · BTU/Wh11.2–13.5174 / 174
HSPF2 · BTU/Wh8.1–10.2174 / 174
Cooling capacity · BTU/h21,600–24,000174 / 174
Heating capacity at 47°F / 8.3°C · BTU/h23,600–27,400174 / 174
Heating capacity at 17°F / −8.3°C · BTU/h18,700–22,400174 / 174
Heating capacity at 5°F / −15°C · BTU/h13,900–18,600174 / 174
COP at 5°F / −15°C1.7–2.3174 / 174
Equipment / loop typeHP - Split System174 / 174
Refrigerant / source-reported GWPR-454B (GWP:470 | Lower GWP)174 / 174
Compressor stagingContinuously variable174 / 174
Connected capabilityNo174 / 174

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 furnaceSEER2BTU/WhHSPF2BTU/WhHeating capacity at 5°F / −15°CBTU/hCOP at 5°F / −15°CRecord & comparison
CK40HT-24B-**+TDR+ furnace: ML197UH030XE36B*Cold climate designationAHRI reference: 21874511221.008.20181001.90EPA 4705664
CBK48MVT-030-230-**Cold climate designationAHRI reference: 21711527820.5010.00179002.22EPA 4006007
CBK48MVT-018/024-230-**Cold climate designationAHRI reference: 21711528020.5010.00186002.30EPA 4006008
CBK45UHVT-030-230-**Cold climate designationAHRI reference: 21712196220.508.50178002.16EPA 4006387
CBK47UHET-024-230-**Cold climate designationAHRI reference: 21712196420.509.80186002.30EPA 4006388
CBK47UHET-030-230-**Cold climate designationAHRI reference: 21712196320.509.80179002.14EPA 4006389
CK40DT-30/36C-**+TDR+ furnace: SLP99DF090XV36C*AHRI reference: 21744315420.508.50162002.04EPA 4044524
CK40HT-30A-**+TDR+ furnace: EL280UH045E36A*AHRI reference: 21744319320.509.00167002.04EPA 4044589
CK40[C,U]T-30B-**+TDR+ furnace: SL297UH040NV36B*Cold climate designationAHRI reference: 21711528820.0010.00177002.12EPA 4006015
CK40[C,U]T-30A-**+TDR+ furnace: EL180UH040NE36A*Cold climate designationAHRI reference: 21712152920.009.80176002.10EPA 4006416
CK40[C,U]T-30A-**+TDR+ furnace: EL180UH060NE36A*Cold climate designationAHRI reference: 21712153020.009.80176002.10EPA 4006417
CK40[C,U]T-30A-**+TDR+ furnace: ML180UH070V36A*Cold climate designationAHRI reference: 21712154820.009.60174002.10EPA 4006435
CK40[C,U]T-30B-**+TDR+ furnace: ML180UH070V36B*Cold climate designationAHRI reference: 21712154920.009.60174002.10EPA 4006436
CK40[C,U]T-30B-**+TDR+ furnace: ML180UH090V48B*Cold climate designationAHRI reference: 21712155320.009.60177002.10EPA 4006440
CBK45UHVT-024-230-**AHRI reference: 21744313420.009.80173002.10EPA 4044428
CK40DT-30/36B-**+TDR+ furnace: SL280DF090V48B*AHRI reference: 21744314320.008.50163002.00EPA 4044512
CK40DT-30/36B-**+TDR+ furnace: EL297DF045XV36B*AHRI reference: 21744314420.008.50162002.02EPA 4044514
CK40DT-30/36B-**+TDR+ furnace: SLP99DF070XV36B*AHRI reference: 21744314520.008.50163002.00EPA 4044515
CK40HT-30B-**+TDR+ furnace: ML180UH070V36B*Cold climate designationAHRI reference: 21744316220.009.00169002.06EPA 4044531
CK40HT-30B-**+TDR+ furnace: ML180UH070V48B*Cold climate designationAHRI reference: 21744316420.008.50169002.06EPA 4044533

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 →