Lennox / AIR-SOURCE HEAT PUMP

MLB024S4S-1P

M series · MMA series

14 published source records · source checked Sep 21, 2026

SEER2 range18.4–21.5BTU/Wh
HSPF2 range9.1–11.5BTU/Wh
Cooling capacity21,600–24,000BTU/h

Each efficiency range summarizes published EPA records for MLB024S4S-1P. 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 14 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/Wh18.4–21.514 / 14
EER2 · BTU/Wh11–1314 / 14
HSPF2 · BTU/Wh9.1–11.514 / 14
Cooling capacity · BTU/h21,600–24,00014 / 14
Heating capacity at 47°F / 8.3°C · BTU/h23,400–29,00014 / 14
Heating capacity at 17°F / −8.3°C · BTU/h16,900–21,20014 / 14
Heating capacity at 5°F / −15°C · BTU/h21,200–27,00014 / 14
COP at 5°F / −15°C1.89–2.2114 / 14
Equipment / loop typeHP - Mini or Multi Split · HP - Split System14 / 14
Refrigerant / source-reported GWPR-410A (GWP:2088)14 / 14
Compressor stagingContinuously variable14 / 14
Connected capabilityNo14 / 14

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
MWMC024S4*Cold climate designationAHRI reference: 21066563021.5011.40250002.21EPA 2469760
MWMC024S4-1PCold climate designationAHRI reference: 20768352321.5011.40250002.21EPA 2469800
MWMC024S4-*PCold climate designationAHRI reference: 21103444321.5011.40250002.21EPA 2470531
M33C024S4-1PCold climate designationAHRI reference: 20768353420.5011.50258002.00EPA 2469758
MCFA024S4-2PCold climate designationAHRI reference: 20768353020.5011.00250002.10EPA 2469793
MCFA024S4-*PCold climate designationAHRI reference: 21103445220.5011.00250002.10EPA 2470476
M33C024S4-*PCold climate designationAHRI reference: 21103445820.5011.50258002.00EPA 2470485
M33C024S4*Cold climate designationAHRI reference: 21066564520.5011.50258002.00EPA 2470612
MCFA024S4*Cold climate designationAHRI reference: 21066563920.5011.00250002.10EPA 2470677
MMDB024S4-2PCold climate designationAHRI reference: 20768352719.2010.50270002.00EPA 2469767
MMDB024S4*Cold climate designationAHRI reference: 21066563419.2010.50270002.00EPA 2470613
MMDB024S4-*PCold climate designationAHRI reference: 21103444719.2010.50270002.00EPA 2470675
MWMA024S4-2PCold climate designationAHRI reference: 20854603418.9010.40234001.89EPA 2470681
MMA024SM4-*PCold climate designationAHRI reference: 21234805018.409.10212001.90EPA 2548059

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 →