Data / ENERGY STAR / Mini-split heat pumps / Willis
Willis ENERGY STAR certified mini-split heat pumps: 58 models
Willis has 58 ENERGY STAR certified products in mini-split heat pumps on the EPA's list as read on November 4, 2026, which puts it number 89 of 226 brands by model count. Its newest certification is MZUHW36KR32-O, dated September 30, 2026.
SpecStream is the live web data engine for teams and agents. It reads the EPA's ENERGY STAR certified product lists, keyed on the ENERGY STAR Unique ID, and this page is that reading. Ask for the products you track by category, brand or rating, and each new certification arrives in your sheet, CRM, Slack or agent as the EPA publishes it.
- Certified products
- 58
- Newest certification
- September 30, 2026
- Brands in this category
- 226
Willis certified mini-split heat pumps
Newest first. Each row links to the product's record in the EPA's open data portal.
| Model | SEER2 (Btu/Wh) | EER2 (Btu/Wh) | HSPF2 (Btu/Wh) | Indoor Unit Model Number | ENERGY STAR ID | Certified | Source |
|---|---|---|---|---|---|---|---|
| MZUHW36KR32-O | 18 | 11 | 8.1 | 3995662 | September 30, 2026 | data.energystar.gov | |
| MZUHW18KR32-O | 16 | 11 | 8.1 | 3995658 | September 30, 2026 | data.energystar.gov | |
| AUHW09KR32-O | 22.3 | 14.3 | 9.5 | WHEDT09K | 4470753 | September 22, 2026 | data.energystar.gov |
| AUHW12KR32-O | 21.5 | 13 | 9 | WHEDT12K | 4470748 | September 22, 2026 | data.energystar.gov |
| CHW12KCH18S2-O | 17.5 | 8.7 | 8.5 | CHW12KCH18S2-I | 4652561 | June 25, 2026 | data.energystar.gov |
| CHW24KR32-O | 19 | 11.9 | 8.5 | CHW24KR32-I | 4514314 | June 13, 2026 | data.energystar.gov |
| AUHW09KR32-O | 24.5 | 15.5 | 9.5 | WCT4W09K | 4470754 | June 13, 2026 | data.energystar.gov |
| AUHW09KR32-O | 30 | 16.8 | 11.2 | AUHW09KR32-I | 3997962 | June 13, 2026 | data.energystar.gov |
| MZUHW30KCH21S2-O | 21 | 12.5 | 10 | 3544193 | June 13, 2026 | data.energystar.gov | |
| MZUHW24KCH21S2-O | 21 | 12.5 | 10 | 3544192 | June 13, 2026 | data.energystar.gov | |
| MZUHW18KCH21S2-O | 21 | 12 | 10 | 3544191 | June 13, 2026 | data.energystar.gov | |
| MZUHW42KCH21S2-O | 21 | 12 | 10 | 3544190 | June 13, 2026 | data.energystar.gov | |
| MZUHW36KCH21S2-O | 21 | 12 | 10 | 3544189 | June 13, 2026 | data.energystar.gov | |
| PUHW12KCH24S2-O | 24 | 12.5 | 9 | PUHW12KCH24S2-I | 3475357 | June 13, 2026 | data.energystar.gov |
| PUHW18KCH23S2-O | 23 | 12.5 | 8.5 | PUHW18KCH23S2-I | 3475355 | June 13, 2026 | data.energystar.gov |
| AUHW12KR32-O | 23.1 | 13 | 9 | WCS12K | 4470752 | May 28, 2026 | data.energystar.gov |
| AUHW12KR32-O | 23 | 13 | 8.5 | WFC12K | 4470751 | May 28, 2026 | data.energystar.gov |
| AUHW12KR32-O | 20 | 12.3 | 8.5 | WCT1W12K | 4470750 | May 28, 2026 | data.energystar.gov |
| AUHW12KR32-O | 23 | 13 | 8.5 | WCT4W12K | 4470749 | May 28, 2026 | data.energystar.gov |
| AUHW12KR32-O | 29.5 | 15.2 | 10 | AUHW12KR32-I | 3997966 | May 28, 2026 | data.energystar.gov |
| CHW12KR32-O | 19 | 9.75 | 8.5 | CHW12KR32-I | 4515401 | March 17, 2026 | data.energystar.gov |
| CHW09KAR32-O | 20.5 | 11.9 | 8.8 | CHW09KAR32-I | 4514313 | March 17, 2026 | data.energystar.gov |
| CHW36KR32-O | 21 | 12 | 8.5 | CHW36KR32-I | 4514312 | March 17, 2026 | data.energystar.gov |
| CHW30KR32-O | 22 | 11 | 9 | CHW30KR32-I | 4514311 | March 17, 2026 | data.energystar.gov |
| PUHW09KR32-O | 22 | 14.2 | 9.2 | WHEDT09K | 4470742 | March 17, 2026 | data.energystar.gov |
| PUHW09KR32-O | 25 | 14.2 | 9.6 | WFC09K | 4470741 | March 17, 2026 | data.energystar.gov |
| PUHW09KR32-O | 22 | 13.1 | 9.5 | WCT1W09K | 4470740 | March 17, 2026 | data.energystar.gov |
| PUHW09KR32-O | 24 | 15 | 9.2 | WCT4W09K | 4470739 | March 17, 2026 | data.energystar.gov |
| PUHW09KR32-O | 23 | 15 | 9.4 | WCS09K | 4470738 | March 17, 2026 | data.energystar.gov |
| PUHW12KR32-O | 24.5 | 13 | 9.5 | PUHW12KR32-I | 3997969 | March 17, 2026 | data.energystar.gov |
| AUHW18KR32-O | 27.5 | 14.3 | 10 | AUHW18KR32-I | 3997967 | March 17, 2026 | data.energystar.gov |
| PUHW18KR32-O | 24.5 | 13.65 | 9 | PUHW18KR32-I | 3997965 | March 17, 2026 | data.energystar.gov |
| PUHW09KR32-O | 26 | 15 | 10.4 | PUHW09KR32-I | 3997964 | March 17, 2026 | data.energystar.gov |
| PUHW36KR32-O | 21 | 12 | 8.5 | PUHW36KR32-I | 3997963 | March 17, 2026 | data.energystar.gov |
| MZUHW42KR32-O | 19 | 12.2 | 9 | 3995667 | March 17, 2026 | data.energystar.gov | |
| MZUHW36KR32-O | 19 | 11.8 | 9 | 3995666 | March 17, 2026 | data.energystar.gov | |
| MZUHW30KR32-O | 19 | 12.2 | 9 | 3995665 | March 17, 2026 | data.energystar.gov | |
| MZUHW24KR32-O | 19 | 12.2 | 9 | 3995664 | March 17, 2026 | data.energystar.gov | |
| MZUHW42KR32-O | 18 | 12 | 8.1 | 3995663 | March 17, 2026 | data.energystar.gov | |
| MZUHW30KR32-O | 18 | 12 | 8.1 | 3995661 | March 17, 2026 | data.energystar.gov | |
| MZUHW24KR32-O | 18 | 12 | 8.1 | 3995660 | March 17, 2026 | data.energystar.gov | |
| MZUHW18KR32-O | 19 | 11.8 | 9 | 3995659 | March 17, 2026 | data.energystar.gov | |
| MZUHW42KR32-O | 21 | 13 | 10 | 3995657 | March 17, 2026 | data.energystar.gov | |
| MZUHW36KR32-O | 21 | 12 | 10 | 3995656 | March 17, 2026 | data.energystar.gov | |
| MZUHW30KR32-O | 21 | 13.6 | 10 | 3995655 | March 17, 2026 | data.energystar.gov | |
| MZUHW24KR32-O | 21 | 13.3 | 10 | 3995654 | March 17, 2026 | data.energystar.gov | |
| MZUHW18KR32-O | 21 | 12 | 10 | 3995653 | March 17, 2026 | data.energystar.gov | |
| CHW18KR32-O | 20 | 12 | 8.5 | CHW18KR32-I | 4515402 | January 14, 2026 | data.energystar.gov |
| AUHW24KR32-O | 27 | 13.95 | 10 | AUHW24KR32-I | 3997968 | November 20, 2025 | data.energystar.gov |
| PUHW12KR32-O | 23 | 13 | 9 | WCS12K | 4470747 | November 7, 2025 | data.energystar.gov |
| PUHW12KR32-O | 23 | 13 | 9.5 | WFC12K | 4470746 | November 7, 2025 | data.energystar.gov |
| PUHW12KR32-O | 21.5 | 12.3 | 9.5 | WCT1W12K | 4470745 | November 7, 2025 | data.energystar.gov |
| PUHW12KR32-O | 23 | 13 | 9 | WCT4W12K | 4470744 | November 7, 2025 | data.energystar.gov |
| PUHW12KR32-O | 21 | 13 | 9 | WHEDT12K | 4470743 | November 7, 2025 | data.energystar.gov |
| PUHW24KR32-O | 26 | 13.65 | 10 | PUHW24KR32-I | 3997961 | November 7, 2025 | data.energystar.gov |
| AUHW09KR32-O | 23.3 | 15.3 | 9.5 | WCS09K | 4470757 | July 9, 2025 | data.energystar.gov |
| AUHW09KR32-O | 22.5 | 13.65 | 9.5 | WCT1W09K | 4470756 | July 9, 2025 | data.energystar.gov |
| AUHW09KR32-O | 25.5 | 14.3 | 9.8 | WFC09K | 4470755 | July 9, 2025 | data.energystar.gov |
More
Updated November 4, 2026. Read from ENERGY STAR certified product data, US Environmental Protection Agency (data.energystar.gov). Public domain data from the US EPA and the US Department of Energy. Products are listed as the EPA publishes them on the date this page was read, and the EPA can revise or withdraw a certification. A product is counted once, under the most specific list that holds it. For heat pumps each ENERGY STAR ID is one outdoor and indoor unit combination, so a model number can repeat. Brand names are as published. This page uses EPA data and is not endorsed or certified by the EPA or ENERGY STAR. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.