Willis / AIR-SOURCE HEAT PUMP
PUHW18KCH23S2-O
Heatfinity · EPA record 3475355
Source checked Sep 21, 2026
Performance & equipment details
Values below belong to EPA record 3475355. Temperature points and test metrics are preserved as reported. Missing and zero values are not substituted with estimates.
| Metric or attribute | Source value |
|---|---|
| SEER2 · BTU/Wh | 23.00 |
| EER2 · BTU/Wh | 12.50 |
| HSPF2 · BTU/Wh | 8.50 |
| Cooling capacity · BTU/h | 18000 |
| Heating capacity at 47°F / 8.3°C · BTU/h | 18000 |
| Heating capacity at 17°F / −8.3°C · BTU/h | 14600 |
| Heating capacity at 5°F / −15°C · BTU/h | 13000 |
| COP at 5°F / −15°C | 1.85 |
| Equipment / loop type | HP - Mini or Multi Split |
| Refrigerant / source-reported GWP | R-410A (GWP:2088) |
| Compressor staging | Continuously variable |
| Connected capability | No |
This listed system
These ratings apply to the listed configuration. Changing a component may change performance.
Outdoor unit
+PUHW18KCH23S2-OIndoor unit
PUHW18KCH23S2-IAHRI reference 214609736 · reported by ENERGY STAR; no direct AHRI data connection.
All source records for PUHW18KCH23S2-O →Specifications & provenance
Every value below is preserved from the source record. Checked Sep 21, 2026. Asterisks and other model wildcards are retained as published.
| Source field | Reported value | Evidence |
|---|---|---|
| pd id | 3475355 | EPA Sep 21, 2026 |
| markets | United States, Canada | EPA Sep 21, 2026 |
| cop at 5 f | 1.85 | EPA Sep 21, 2026 |
| eer2 btu wh | 12.50 | EPA Sep 21, 2026 |
| series name | Heatfinity | EPA Sep 21, 2026 |
| cold climate | Yes | EPA Sep 21, 2026 |
| hspf2 btu wh | 8.50 | EPA Sep 21, 2026 |
| model number | PUHW18KCH23S2-O | EPA Sep 21, 2026 |
| product type | HP - Mini or Multi Split | EPA Sep 21, 2026 |
| seer2 btu wh | 23.00 | EPA Sep 21, 2026 |
| date certified | 2026-06-13T00:00:00.000 | EPA Sep 21, 2026 |
| manufacturer type | System Manufacturer | EPA Sep 21, 2026 |
| compressor staging | Continuously variable | EPA Sep 21, 2026 |
| energy star partner | 4435273 Canada Inc | EPA Sep 21, 2026 |
| connected capability | No | EPA Sep 21, 2026 |
| refrigerant with gwp | R-410A (GWP:2088) | EPA Sep 21, 2026 |
| ahri reference number | 214609736 | EPA Sep 21, 2026 |
| cooling capacity btu h | 18000 | EPA Sep 21, 2026 |
| indoor unit brand name | WILLIS | EPA Sep 21, 2026 |
| outdoor unit brand name | Willis | EPA Sep 21, 2026 |
| date available on market | 2024-04-24T00:00:00.000 | EPA Sep 21, 2026 |
| indoor unit model number | PUHW18KCH23S2-I | EPA Sep 21, 2026 |
| energy star model identifier | ES_1128541_PUHW18KCH23S2-O_04242024021935_770322 | EPA Sep 21, 2026 |
| heating capacity at 5 f btu h | 13000 | EPA Sep 21, 2026 |
| meets most efficient criteria | Yes | EPA Sep 21, 2026 |
| heating capacity at 17 f btu h | 14600 | EPA Sep 21, 2026 |
| heating capacity at 47 f btu h | 18000 | EPA Sep 21, 2026 |
| meets peak cooling requirements | No | EPA Sep 21, 2026 |
| controls verification procedure cvp test | ENERGY STAR CVP Test | EPA Sep 21, 2026 |