US EQUIPMENT REFERENCE

Willis / page 2

35 equipment models and 71 source-listed options. Brand names follow the published records; a shared manufacturer does not imply interchangeable equipment.

RefineClear

35 models · Source-backed US equipment index

A model may have several rated combinations.
WillisAir-source heat pump

MULTI HEAT

MZUHW36KR32-O

3 published source records

18–21SEER2 range
8.1–10HSPF2 range

3 EPA outdoor-model records do not list an indoor configuration. Open the ratings to check their scope.

WillisAir-source heat pump

MultiHeat

MZUHW42KCH21S2-O

1 published source record

21SEER2 range
10HSPF2 range

1 EPA outdoor-model records do not list an indoor configuration. Open the ratings to check their scope.

WillisAir-source heat pump

MULTI HEAT

MZUHW42KR32-O

3 published source records

18–21SEER2 range
8.1–10HSPF2 range

3 EPA outdoor-model records do not list an indoor configuration. Open the ratings to check their scope.

WillisAir-source heat pump

Ultra Heat Rooftop Series

PRT60KUH

1 published source record

17SEER2 range
8.3HSPF2 range

Open a configuration for heating capacity at 47°F, 17°F and 5°F, COP and EER2.

WillisAir-source heat pump

Multiple source series

PUHW09KR32-O

6 published source records

22–26SEER2 range
9.2–10.4HSPF2 range

Open a configuration for heating capacity at 47°F, 17°F and 5°F, COP and EER2.

WillisAir-source heat pump

Multiple source series

PUHW12KR32-O

6 published source records

21–24.5SEER2 range
9–9.5HSPF2 range

Open a configuration for heating capacity at 47°F, 17°F and 5°F, COP and EER2.

WillisAir-source heat pump

HEATFINITY

PUHW18KR32-O

1 published source record

24.5SEER2 range
9HSPF2 range

Open a configuration for heating capacity at 47°F, 17°F and 5°F, COP and EER2.

WillisAir-source heat pump

HEATFINITY

PUHW24KR32-O

1 published source record

26SEER2 range
10HSPF2 range

Open a configuration for heating capacity at 47°F, 17°F and 5°F, COP and EER2.

WillisAir-source heat pump

CENTURION

PUHW36KR32-O

1 published source record

21SEER2 range
8.5HSPF2 range

Open a configuration for heating capacity at 47°F, 17°F and 5°F, COP and EER2.