Willis / AIR-SOURCE HEAT PUMP

MZUHW30KR32-O

MULTI HEAT

3 published source records · source checked Sep 21, 2026

SEER2 range18–21BTU/Wh
HSPF2 range8.1–10BTU/Wh
Cooling capacity28,400BTU/h

Each efficiency range summarizes published EPA records for MZUHW30KR32-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.

Model patterns and component strings are preserved exactly. How to read model patterns and combinations →

Indoor configuration coverage

3 of 3 EPA records for this model do not list individual indoor units. EPA’s reporting template permits this for multi-split systems. Manufacturer-documented kits are identified on their individual source pages. These rows identify an outdoor-model rating and do not establish a complete matched system or compatibility with an arbitrary indoor unit.

Heating performance & equipment details

Ranges include the 3 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/Wh18–213 / 3
EER2 · BTU/Wh12–13.63 / 3
HSPF2 · BTU/Wh8.1–103 / 3
Cooling capacity · BTU/h28,4003 / 3
Heating capacity at 47°F / 8.3°C · BTU/h30,0003 / 3
Heating capacity at 17°F / −8.3°C · BTU/h27,200–28,0003 / 3
Heating capacity at 5°F / −15°C · BTU/h26,000–27,0003 / 3
COP at 5°F / −15°C1.81–2.073 / 3
Equipment / loop typeHP - Mini or Multi Split3 / 3
Refrigerant / source-reported GWPR-32 (GWP:675 | Lower GWP)3 / 3
Compressor stagingContinuously variable3 / 3
Connected capabilityNo3 / 3

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.

Source ratings & listed 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
Indoor configuration not listed by EPAOutdoor-model rating; match not listedCold climate designationAHRI reference: 21677231021.0010.00270002.07EPA 3995655
Indoor configuration not listed by EPAOutdoor-model rating; match not listedCold climate designationAHRI reference: 21677232019.009.00264001.81EPA 3995665
Indoor configuration not listed by EPAOutdoor-model rating; match not listedCold climate designationAHRI reference: 21677231618.008.10260001.88EPA 3995661

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 →