Century / GEOTHERMAL HEAT PUMP
HNW036
TRANQUILITY WATER TO WATER SERIES · EPA record 3845819
Source checked Sep 21, 2026
Performance & equipment details
Values below belong to EPA record 3845819. Temperature points and test metrics are preserved as reported. Missing and zero values are not substituted with estimates.
| Metric or attribute | Source value |
|---|---|
| Heating COP | 3.6 |
| Cooling EER · BTU/Wh | 20.8 |
| Equipment / loop type | Open Loop Water-to-Water |
| Refrigerant | R-410A |
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 | 3845819 | EPA Sep 21, 2026 |
| markets | United States, Canada | EPA Sep 21, 2026 |
| brand name | Century | EPA Sep 21, 2026 |
| cop rating | 3.6 | EPA Sep 21, 2026 |
| eer rating | 20.8 | EPA Sep 21, 2026 |
| model name | TRANQUILITY WATER TO WATER SERIES | EPA Sep 21, 2026 |
| model number | HNW036 | EPA Sep 21, 2026 |
| product type | Open Loop Water-to-Water | EPA Sep 21, 2026 |
| date qualified | 2024-12-11T00:00:00.000 | EPA Sep 21, 2026 |
| refrigerant type | R-410A | EPA Sep 21, 2026 |
| energy star partner | ClimateMaster Inc. | EPA Sep 21, 2026 |
| date available on market | 2015-11-20T00:00:00.000 | EPA Sep 21, 2026 |
| energy star model identifier | ES_22828_HNW036_12102024145912_02201756611 | EPA Sep 21, 2026 |
| meets most efficient criteria | Yes | EPA Sep 21, 2026 |