MAINLINE / AIR-SOURCE HEAT PUMP

ML18HP230NEXH-O

ML Series

16 published source records · source checked Sep 21, 2026

SEER2 range18–21.7BTU/Wh
HSPF2 range10–12.3BTU/Wh
Cooling capacity16,000–18,000BTU/h

Each efficiency range summarizes published EPA records for ML18HP230NEXH-O. 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 16 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/Wh18–21.716 / 16
EER2 · BTU/Wh12–1316 / 16
HSPF2 · BTU/Wh10–12.316 / 16
Cooling capacity · BTU/h16,000–18,00016 / 16
Heating capacity at 47°F / 8.3°C · BTU/h17,000–20,00016 / 16
Heating capacity at 17°F / −8.3°C · BTU/h14,000–16,60016 / 16
Heating capacity at 5°F / −15°C · BTU/h17,000–18,00016 / 16
COP at 5°F / −15°C1.86–2.216 / 16
Equipment / loop typeHP - Mini or Multi Split · HP - Split System16 / 16
Refrigerant / source-reported GWPR-454B (GWP:470 | Lower GWP)16 / 16
Compressor stagingContinuously variable16 / 16
Connected capabilityNo16 / 16

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
ML18HP230NEX-I*Cold climate designationAHRI reference: 21760725421.7010.80180002.00EPA 4479968
ML18HP230NEX-ICold climate designationAHRI reference: 21586434121.7010.80180002.00EPA 4688178
ML18HP2301WYCAS-I*Cold climate designationAHRI reference: 21760730220.6012.20175001.89EPA 4480016
ML18HP2301WYCAS-ICold climate designationAHRI reference: 21586438920.6012.20175001.89EPA 4688103
ML18HP230FLO-I*Cold climate designationAHRI reference: 21760729720.4010.30170001.86EPA 4480011
ML18HP230FLO-ICold climate designationAHRI reference: 21586438420.4010.30170001.86EPA 4688106
ML18HP230STDCAS-I*Cold climate designationAHRI reference: 21760728420.0012.30170001.90EPA 4479997
ML16HP230CON-I*Cold climate designationAHRI reference: 21760729620.0010.30175001.95EPA 4480010
ML16HP230CON-ICold climate designationAHRI reference: 21586438320.0010.30175001.95EPA 4688108
ML18HP230STDCAS-ICold climate designationAHRI reference: 21586437120.0012.30170001.90EPA 4688122
ML18HP230HSDUC-I*Cold climate designationAHRI reference: 21760729218.4011.10180002.10EPA 4480006
ML18HP230HSDUC-ICold climate designationAHRI reference: 21586437918.4011.10180002.10EPA 4688156
ML18HP230AHU-I*Cold climate designationAHRI reference: 21760716118.0010.00180002.20EPA 4479761
ML18HP230LSDUC-I*Cold climate designationAHRI reference: 21760728918.0010.50180002.00EPA 4480003
ML18HP230LSDUC-ICold climate designationAHRI reference: 21586437618.0010.50180002.00EPA 4688141
ML18HP230AHU-ICold climate designationAHRI reference: 21586429518.0010.00180002.20EPA 4690933

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 →